Re: [cobirds] Digest for cobirds@googlegroups.com - 3 updates in 2 topics

[Robert Righter]

Brandon

That’s a remarkable total birds detected. Thanks for organizing our state’s 
Bird Count

Cheers, Bob

> On Mar 11, 2024, at 2:20 AM, cobirds@googlegroups.com wrote:
> 
> cobirds@googlegroups.com 
> 
>   Google Groups 
> 
>
> 
>  
> Topic digest  <>
> View all topics 
> 
> Colorado Christmas Bird Counts Final Results (2023-2024) 
>  - 2 Updates
> Dinosaur Ridge - Denver Field Ornithologists (10 Mar 2024) 13 Raptors 
>  - 1 Update
> Colorado Christmas Bird Counts Final Results (2023-2024)  
> 
> Brandon : Mar 10 07:49PM -0600 
> 
> Hi all,
>  
> Colorado had 51 official Christmas Bird Counts conducted this past winter
> (December 14-January 5). This year Colorado counts found 217 species on
> count day, plus two during count week. The total birds counted was way up
> from last winter (763,932) compared to (669,780) in 2022-2023 (same number
> of counts). Quite a few count reached the 100+ species number on count day:
> Pueblo Reservoir (129), Penrose (118), Fort Collins (112), Colorado Springs
> (111), John Martin Reservoir (108), Boulder (107), North JeffCo (102),
> Denver (101), and Loveland (101). Another six counts made it to the 90-99
> species range. Crook in north eastern Colorado, counted the most birds
> (111,274), thanks to the large number of Snow Geese). There were a lot of
> highlights, Colorado's first Christmas Bird Count record, of Pomarine
> Jaeger at Pueblo Reservoir, also a first for count week for any Colorado
> CBC, was a Laughing Gull there as well. A few other CBRC review species
> were reported: Mexican Duck, Yellow-billed Loon, Pacific Wren, and Eastern
> Towhee. A surprising seven species of shorebirds were found, Dunlin on two
> counts and Long-billed Dowitchers on one count. Blue-winged Teal, Turkey
> Vulture, Osprey, Franklin's Gull, Chipping Sparrow are all quite rare in
> winter in Colorado. There's always some interesting water birds this year:
> Trumpeter and Tundra Swans, plus feral Mute Swans, White-winged Scoters,
> Black Scoter, Long-tailed Ducks, Red-throated Loon and Pacific Loons,
> Red-necked Grebe, Short-billed, Glaucous and Great Black-backed Gulls. It
> was nice that White-tailed Ptarmigan, Dusky and Sharp-tailed Grouse,
> Gunnison Sage-Grouse and Greater Prairie-Chickens were all found on a
> Christmas Bird Count in Colorado this past winter. Nine species of owls
> were found. All three species of regular sapsuckers were found, six
> Yellow-bellied, four Red-naped, and three Williamson's. The Phoebe show was
> a bit crazy, 109 Say's Phoebes, six Black Phoebes, two Eastern Phoebes!
> There were 21 Winter Wrens, one Carolina Wren, eight Hermit Thrush, one
> Varied Thrush, six Gray Catbirds, one Brown Thrasher, one Sage Thrasher,
> and four Northern Mockingbirds. Only Steamboat Springs found Bohemian
> Waxwings (19), and only Fort Collins found a Common Redpoll on count day.
> Chestnut-collared and Thick-billed Longspurs were found, neither are
> regular in winter in Colorado, and two Snow Buntings as well. The warblers
> were surprising, eight species were found. Black-and-white, Tennessee,
> Orange-crowned, Black-throated Blue, two Pines, Yellow-throated, and a
> count week Common Yellowthroat, along with 236 Yellow-rumped Warblers. A
> few other sparrows of note: a Field, two Fox, 23 Harris's, 10
> White-throated, Savannah on three counts, 24 Lincoln's, and 29 Swamp. Three
> Pine Grosbeaks wandered to Weldona-Fort Morgan on the eastern plains. My
> full summary has been sent to National Audubon and will be on their website
> at some point.
>  
> Thanks to all the compilers, participants, and feeder watchers who have
> helped with Colorado Christmas Bird Counts this past winter, and other past
> winters.
>  
>  
> Brandon Percival
> Colorado CBC Regional Editor
> Pueblo West, CO
> linda hodges : Mar 10 08:03PM -0600 
> 
> Thank you for taking the time and energy to compile and share this with us,
> Brandon. It's always interesting to see which species' numbers are
> increasing and which are new to the count.
>  
> Did you happen to notice what species' numbers, if any, were down
> significantly this year? Or missing altogether?
>  
> Again, your work is truly appreciated,
> Linda
>  
> *Linda Hodges*
>  
> *Colorado Springs*
>  
>  
>  
> Back to top Dinosaur Ridge - Denver Field 
> Ornithologists (10 Mar 2024) 13 Raptors  
> 
> repo...@hawkcount.org: Mar 11 02:01AM 
> 
> Dinosaur Ridge - Denver Field Ornithologists
> Colorado, USA
> Daily Raptor Counts: 

[cobirds] Cherry Creek Res.

[Robert Righter]

Hi

 One Ad. Lesser-Black-backed Gull  amongst a flock of gulls on the very north 
central side of the res.

Bob Righter
Denver CO

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[cobirds] Ludlow Griscom's (1947) essay about changing bird names.

[Robert Righter]

Hi

>From  chatter on the internet emerges an interesting article by Ludlow Griscom 
>written in1947 “Common Sense in Common names.” Griscom, was a power house in 
>the early 1900s  and greatly influenced Roger Tory Peterson. The full article 
>can be accessed through Google. I’ve taken the liberty of just featuring the 
>last paragraph which I thought was the most poignant to our conversation on 
>Bird Names.

"NO “simple and logical principles” for vernacular nomenclature can be 
formulated. There are far too many birds; their variations, relationships, and 
ranges are not simple or logical. Their habits and habitats change from season 
to season, from one section of the continent to another, from century to 
century. Which season, which habitat, which section of the country is to be the 
basis for the “appropriate or associative” name?"

Bob Righter
Denver CO

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[cobirds] Cherry Creek SP-Barrow's Goldem-eye

[Robert Righter]

Hi

No Loons, but there was a gorgeous ad male Barrow’s Golden-eye diving in the 
south-west corner, seen at about 1:pm.

For those interested, the golden-eye was first discovered by Thomas Drummond in 
1819 while exploring, on a solo expedition to the Canadian Rocky Mountains. The 
new species was then formally named after John Barrow, Secondary Secretary of 
the Royal Navy whose main responsibility  was to oversee a discovery of a 
North-west passage through the ice covered Canadian Arctic which would have  
connected trade with the Asian markets. A route was never found, but still 
England had great admiration for Barrow, thus Barrow’s Golden-eye.

Bob Righter
Denver, CO 

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[cobirds] Cherry Creek SP

[Robert Righter]

Hi

6 Common Loons, most observed in the center and southern part of lake.
1 Red-breasted Merganser in non breading plumage in center of lake.
20+/- Bonaparte’s Gull ( named after Napoleon Bonaparte nephew, He was quite 
the ornithologist  in his day, early 1800’s)

Bob Righter
Denver CO

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[cobirds] Benefits of Keeping the Original Bird Names.

[Robert Righter]

Hi

What a fascinating discussion we are all having on Cobirds about the 
implication of changing the names of birds.

Birds named after historical individuals offer important links to the rich 
history,  good and bad, about  how our country was formed but also how the 
history of birds evolved from hunting to the trill of bird watching, to the 
impressive  transformation from birding into an important scientific 
organization,  American Ornithological Union AOU.

Here are some brief examples of some:

Lewis’s Woodpecker, named after Meriwether Lewis, the co-leader of the 
stupendously successful Lewis and Clark Expedition in the early 1800s which 
explored all the new land west to the Pacific Ocean. 

John Cassin (Cassin’s Finch, Cassin’s Kingbird and many more) from the 
Philadelphia Academy of Natural Science was one of the foremost ornithologist 
of the ninetieth century describing numerous new bird species. He fought form 
the Union Army during the Civil War, captured by the Confederate Army, and 
spent the rest of the war in the sadistic Libby Prison, not many survived, he 
was lucky, but died shortly afterwards 

John McCowen, (McCown’s Longspur),  now the Thick-billed Longspur. was a Major 
General in the Confederate Army, He was a brilliant tactician with just a few 
hundred men and one piece of artillery, he defeated an entire division of Union 
cavalry. McCown became disillusioned with the purpose  of Confederacy and 
argued against it’s goals and is is quoted as  saying about the Confederacy, 
“…a damned stinking cotton oligarchy.
Was McCown a villain or a brave hero who took the deadly risk to speaking 
against the Confederacy?

Steller’s Jay named after Georg Steller a brilliant German scientist who was 
asked by Peter the Great to explore Russia, which he did during the winter by 
dog sled. Hooked up with Captain Bering and set sail to the east and where they 
discovered Alaska, then spent years ship wrecked on  Bering Island in the 
middle of the Aleutian Islands. He survived most others didn’t.
 
This is just a taste of the intriguing history that underlies each of the bird 
species named after historic naturalist and ornithologist. More involved 
biographies of each  can be found in the Colorado Field Ornithologist Journals 
or just tap into Google & Wikipedia

Do you think this level of information enhance bird watching or not.

Bob Righter
Denver CO



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[cobirds] AOU, Changing bird names

[Robert Righter]

Hi:

I would hope the American Ornithological Union would pause before changing 
common names of birds that are named after historic ornithologists as that 
could be divisive . Currently we are living in a period of time where 
accusations of racism are rampant and consequently we are currently judging 
past historic figures based on our current definition of how racist they may 
have been. This is how history becomes distorted and historic individuals 
unfortunately become misjudged. Let’s wait a decade or so and revisit the topic 
again when hopefully our lenses are clearer, less tainted. Why are we in such 
the rush to change the common names of birds that have been established for 
centuries. We all need to take a deep breath or two and wait to see what 
transpires.

Bob Righter
Denver, CO

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[cobirds] What Chris Wood is up to

[Robert Righter]

Hi

Chris, who was nurtured in birding growing up in Colorado, is now Director of 
eBird at Cornell Lab of Ornithology. Recently Chris was giving remarks about 
citizen science to The Standing Committee on Science and research at the House 
of Commons in the Canadian Parliament. (Living Bird, Summer 2023 Vol. 42, Issue 
3.)

Bob Righter
Denver CO

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[cobirds] Nick Komar

[Robert Righter]

During Nick Komar role as president of the CFO, the club has expanded its 
trajectory from just being a birding club towards something far more meaningful 
in importance. I can’t think of any other state birding organization that’s 
raised thousands of dollars for important bird conservation.

Thank you Nick

Bob Righter
Denver CO

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[cobirds] Does Quantum Mechanics Explain Bird Behavior

[Robert Righter]

Quantum mechanics has been used to explain how everything exists and functions. 
A simplified explanation of Albert Einstein’s theory is that everything is 
deeply entangled with everything else, and everything is constantly in flux 
(Bard). From eons ago climate has been constantly changing. No two days are the 
same. Environments are never the same today as they were and will never be same 
any time in the future. Birds are constantly altering their behavior, adapting 
to different migration patterns, breeding strategies, communication skills….. 
and the beat goes on.
 
Bob Righter
Denver, CO 

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[cobirds] Cheery Crk Res--Highlites

[Robert Righter]

Hi:

Swan,  south part of res.  suggestive for a Tundra Swan

Pacific Loons: two adults north-central part of the reservior.

Possible adult Lesser Black-backed Gull. At a distanced next to the northern 
shore line, a very dark-backed gull with a noticeable yellow bill.

Bob Righter
Denver, CO

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[cobirds] Cherry Creek Res--highlights

[Robert Righter]

Hi

Surf Scoter—Floating in southern third of Res

Long-billed Dowither—still present

Neotropic Cormorant—still present. Described by Alexander von Humboldt, 1805, 
Orinoco R., Columbia

Sandhill Cranes—in two large “V” about 60 individuals

American Pipit——about 15 feeding on mud flats, south side

Bob Righter
Denver, CO

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[cobirds] Re Birds and Banding

[Robert Righter]

Hi

Wish I could make Charlie Chase's Bird and Banding workshops at Barr Lake. 

Charlie his one of those gifted teachers that can make complicated natural 
history topics not only easy to understand but also in a fun way.

Bob Righter
Denver CO

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[cobirds] Bird Migration Explorer

[Robert Righter]

Hi:

Apparently is a new tool for exploring where and when bird species migrate. 
This is what we have all been waiting for and has the potential for being a 
tremendous tool for evaluating bird migration on a whole bunch of different 
levels. 

I tried using it, but of course everything I clicked on nothing worked, but 
then again I shouldn’t be allowed to even touch a computer, given the pathetic 
levels of my computer skills. 

It will be interesting in what others think?

Bob Righter
Denver CO

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[cobirds] Crow Valley CPGD, Weld Co, Highlites

[Robert Righter]

Hi

After the fog lifted the birds began to move.

Red-headed Woodpecker, male, southwest side, working the fence line, looking 
for insects.

Great-crested Flycatcher; northwest side, feasting on the fruit from a Russian 
Olive.

Bob Righter
Denver, CO


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[cobirds] Where do the birds go after breeding

[Robert Righter]

Hi

In Colorado, birds breeding in our forests, start to move south when the 
breeding season concludes. It has always been assumed that the young fledging 
hangs around the nest site and then slowly shuffle their way south. But 
recently it’s been discovered that the young actually leave the forest as fast 
as they can and head for the safety of the dense thickets that are along the 
edges of the forests, along roadsides, in clear cuts and any other places where 
the thickets occur. Thickets are where all the actions is; protection from 
raptors which can’t squeeze their way through the tangled thicket branches, 
insects are plentiful and the berries are juicy. So what should we conclude 
from this information. Maybe instead of wasting time endlessly time peering 
through tall leafy trees, it maybe more productive in stead focusing on the 
thickets?

This information was adapted from Scott Weidensaul’s 2021, A World on the Wing…

Bob Righter
Denver, CO

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[cobirds] Re: Colorado's Amish Bird watcher

[Robert Righter]

Hi all

I don’t know Susan, but the way John describes her, I know I’d also be a friend 
of hers. She sounds like a wonderful person and our birding community  will 
miss her.

Bob Righter
Denver CO

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[cobirds] Johanna Beam

[Robert Righter]

Hi

Thanks to Peter Gent for not only alerting us about the new meadowlark species, 
Chihuahuan Meadowlark, but also for letting us know about  Johanna Beam, from 
Colorado, who wrote the convincing paper resulting in the Eastern Meadowlark’s 
subspecies, "Lilian’s” being elevated to a new species. Takes a lot of 
perseverance and skill to pull that off. Now all we have do is to figure out 
what this new meadowlark looks like. This maybe equally challenging. 

Bob Righter
Denver, CO  

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[cobirds] Eastern Screech-Owl

[Robert Righter]

Hi

While taking Lovey for her evening walk. at 08:20 pm heard an Eastern 
Screech-Owl calling for about 45 seconds, then the owl stopped. Waited for 
about 15 minutes, no more vocalization? 2300 block of South Milwaukee.

Bob Righter
Denver CO 

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[cobirds] Climate Change

[Robert Righter]

Hi

If you are concerned about climate change, think about trees. Just one healthy 
tree can absorb from the air a whopping 50 pounds of noxious, climate-changing, 
carbon dioxide in just one year! One large tree can supply a healthy dose of 
oxygen to sustain four people for one day.

The next time you see a tree, stand in front of it and graciously bow, then 
take one step forward and with great passion give the tree a big meaningful 
hug, then happily move on.

Bob Righter
Denver CO

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[cobirds] Re- Yellow Rail

[Robert Righter]

Hi

WOW. That’s really exciting news from Monte Vista NWR

Bob Righter
Denver CO

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Re: [cobirds] Digest for cobirds@googlegroups.com - 5 updates in 3 topics

[Robert Righter]

> On Jul 13, 2022, at 2:20 AM, cobirds@googlegroups.com wrote:
> 
> cobirds@googlegroups.com 
> 
>   Google Groups 
> 
>
> 
>
> Topic digest  <>
> View all topics 
> 
> Yellow Rail  - 1 Update
> potential YELLOW RAIL, Monte Vista NWR, Rio Grande County 
>  - 3 Updates
> Ferruginous Hawk, Park County  - 1 Update
>  <>Yellow Rail  
> 
>   
> Luke Pheneger : Jul 12 06:53PM -0600 
> 
> Yellow Rail at Monte Vista is calling now.
>  
>  
> Luke P
> Will A
> Pablo Q
> Sean H
> Back to top  <>potential YELLOW RAIL, Monte Vista NWR, 
> Rio Grande County  
> 
>   
> Eric DeFonso : Jul 12 09:24AM -0600 
> 
> Hi all,
>  
> This morning I had an audio encounter with what I'm pretty sure is a YELLOW
> RAIL, at the Monte Vista NWR between about 645-730 this morning. I made
> several sound recordings and shared them with Nathan Pieplow, who agrees
> that this sounds like the real deal.
>  
> I personally have no prior experience with this species but the ticking
> sounds in the recordings I made are just like those that I've listened to
> over the years in a number of commercial collections showcasing them.
>  
> Below is the exact lat/lon where I was when I first encountered the bird.
> It was amidst the thick bulrushes initially, probably only 5-10 yards away.
> From that point it slowly made its way westward and southward deeper into
> the marsh. When I left the area around 730 it was still audible, but
> becoming fainter. My guess (or hope) is that it was "doing the rounds" so
> may come back around to the parking area where I first detected it at some
> point.
>  
> (37.487640, -106.136866)
>  
> Nathan suggests that a crepuscular or nocturnal visit to the refuge may be
> more successful in detecting the species in general, although as I
> mentioned I heard it in the 7am timeframe. Lots of other marsh birds in the
> area of course making listening a little challenging, like Marsh Wrens,
> Wilson's Snipes, American Coots, Red-winged Blackbirds, and Common
> Yellowthroats. Also Sora and Virginia Rails calling occasionally.
>  
> I know of only one previous record for this species in Colorado, from July
> 1906 at Barr Lake. I don't know if that was a specimen or not.
>  
> I will be in the Monte Vista area a few more hours before I have to leave.
> Feel free to contact me for more info, but hopefully this message helps.
>  
> Good birding,
> Eric
>  
> ---
> Eric DeFonso
> near Lyons, Boulder County, CO
> "David Tønnessen" : Jul 12 12:03PM -0700 
> 
> Extremely exciting news, Eric. I imagine that area is exactly the place for 
> the species to potentially breed in the state (hey, they have exclaves in 
> Oregon and sometimes California, so why not Colorado?)
>  
>  
> Greetings,
> David Tonnessen
> On Tuesday, July 12, 2022 at 8:24:51 AM UTC-7 Eric DeFonso wrote:
>  
> "mvjo...@gmail.com" : Jul 12 01:38PM -0700 
> 
> Will be headed there this evening. Stay tuned.
> John Rawinski
> Monte Vista CO
>  
> On Tuesday, July 12, 2022 at 9:24:51 AM UTC-6 Eric DeFonso wrote:
>  
> Back to top  <>Ferruginous Hawk, Park County  
> 
>   
> M T : Jul 12 07:30AM -0700 
> 
> They are actually year-round residents in parts of CO and eBird shows 
> previous sightings in June/July in South Park.
>  
> Michael Tincher
> Loveland,CO
>  
> Back to top 
> You received this digest because you're subscribed to updates for this group. 
> You can change your settings on the group membership page 
> .
> To unsubscribe from this group and stop receiving emails from it send an 
> email to cobirds+unsubscr...@googlegroups.com 
> .

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[cobirds] Trappers Lake-possible Barrow's Goldeneyes

[Robert Righter]

Hi 

Just back from a 4 day trip to Trappers Lake, Garfield Co.

On June 28, in the middle of the lake saw a train of small ducks, 4-5 ducks 
following a leader, as one would expect to see with a family of ducks traveling 
through  the water. My 7X binocs just couldn’t confirm any field marks. The 
ducks were smaller than a nearby Mallard. Conjecture implied a bufflehead-like 
head shape. Since Common Goldeneye is not expected to breed in Colorado that 
left the Barrow’s as a logical choice. Of course it is feasible those ducks 
were something totally different is also likely.

Anyone know if Barrow’s is confirmed nesting at Trapper’s Lake?  

Bob Righter
Denver CO

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[cobirds] 3 Olive-sided Flycatchers

[Robert Righter]

Hi

Just had three Olive-sided Flycatchers briefly land on a tree in our back yard 
in Denver before they journeyed on.

Bob Righter
Denver Colorado

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[cobirds] Brown Pelican, An explanation for an increase in sightings

[Robert Righter]

Hi

By the 1960’s, due to organochlorine pesticides, the once-abundant Brown 
Pelican disappeared from the northern Caribbean (Texas-Louisiana). Today, due 
to conservation initiatives, the Brown Pelican is now again abundant in the 
region, thus explaining the higher possibility of wanderers starting to explore 
distant lands.

Bob Righter
Denver, CO  

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[cobirds] Re Yellow-headed Blackbirds

[Robert Righter]

Hi

I remember years ago being in central Mexico, late winter-early spring, where  
enormous flocks of Yellow-headed Blackbirds wintered. The spectacle was made 
even more dramatic, because of the tendency of blackbirds to separate into  
same sex flocks. So image a huge flock, containing many thousands of male 
Yellow-headed Blackbirds all swooping and swerving, with the flock size 
constantly shifting and re-formulating  in size. From a distant a flock can 
appear like a huge yellow ball, because of the dominate coloration of the 
yellow on head of males. It’s is a visualization that I’ll never forget.

Bob Righter
Denver, CO 

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[cobirds] Re; Marta Hawkins photos

[Robert Righter]

Hi:

After looking at Marta Hawkins excellent photo of a Winter/Pacific Wren, I 
strolled through the rest of the photos and there is a drop-dead, fantastic 
photo of three male Wood Ducks standing on a log. See what you all think.

Bob Righter
Denver, CO


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[cobirds] Conifer, Fire & Birds

[Robert Righter]

Hi

Over the millennia in our temperate western forests, conifers and fire have a 
long, symbiotic relationship.

When unimpeded by fire, the forest grows  proportionally beyond its 
sustainability for maintaining balanced, healthy habitat. Aggressive conifers 
will start invading undesirable habitat and become weak and more susceptible to 
disease and unwanted visits from opportunistic, noxious insects. A lighting 
strike ignites a  spark and the deteriorating conifers will start to burn. 
Eventually when there is less wood to burn fire will gradually reach an 
equilibrium with conifers.

Centuries ago when Europeans arrived the intricate balance of conifer and fire 
dramatically changed. Fire became the villain and suppression of fire became 
the over whelming goal. Even today the national forest’s policy is geared 
towards  suppressing fire. As a result conifers have enjoyed an explosion of 
growth, substantially increasing the volume of wood as potential combustible  
fuel. The unusual intensity of heat brought on by global warming further 
escalated the furnace effect, sucking out what little moisture was left in the 
soil. This has been disastrous for survival of small mammals and birds. The 
unusual die-off of thousands of birds recorded recently in the southwestern 
region is attributed, in part, to the current imbalance of conifer and fire. 
Also, many birds perished as a result of the poisons gasses emitted by the fire.

This short post is adapted from a blog from the Bird Conservancy by David 
McNitt Modern Wild Fires. 

Bob Righter
Denver, CO

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[cobirds] Pueblo Res.

[Robert Righter]

Hi

I’m always impressed by the volume and diversity of birds  from Pueblo Res Xmas 
count, Hats off to Brando and his team.

Bob Righter
Denver CO

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[cobirds] Cherry Creek Res--Common Terns

[Robert Righter]

Hi All

At Pelican Point 

3 worn juvenile Common Terns
5 Yellowlegs, Greater and Lesser
3-4  American Pipits on south shore, viewable from Pelican Point.

Bob Righter
Denver Colorado

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[cobirds] Wilson Warblers-Crow Valley-CG

[Robert Righter]

Hi all

While birding for two hours this morning, I detected 30 migrating Wilson’s 
Warblers. The vast majority were seen in thickets, not so much in the trees. So 
did I see all the Wilson’s Warblers in the campground? Most likely not. Given 
the inventory of thickets in the region, could I reasonable assume I only saw 
about half of the actual number—most likely so.  The Wilson Warbler’s breeding 
range stretches from the Pacific ocean to the Atlantic Ocean, although the 
warbler is more common in the west than in the east.  Since I was only in the 
region for two hours, what could this information mean towards calculating the 
total population for this warbler. Since the campground is just a mere speck in 
the totality of the warbler’s migrating range and just a moment in time, would 
it be reasonable to assume the total population for the warbler to be in the 
millions, hundreds of millions or……?

Given the above example, what would others estimate Wilson’s Warbler total 
population to be?

Bob Righter
Denver CO

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[cobirds] Looking for some Empid fun?

[Robert Righter]

Hi

Crow Valley Camp Ground, Weld Co. 

There seemed to be good migratory pulse of flycatchers landing in the 
campground. Most of the action was in the southwest and northwest sections  
Perhaps about 30 Wood-Pewee, presumedly all Westerns, actively salling from 
tree limbs. Also there were about 20 empids, all appearing in there neat and 
tidy juvenile plumage. The few I saw well showed yellow lower mandible and 
their tails appeared proportionally wide which they frequently  flicked 
upwards. All of these subjective field marks suggested to me they were all 
Willow Flycatchers? There was another group of emipds with noticeable short 
tails, small bills, couldn’t see the under bills. This group appeared to be in 
the Hammond’s/Dusky group.

If you think you need some humiliation, come on out to Crow Valley Campground, 
it could be fun.

Cheers,

Bob Righter
Denver, CO 

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[cobirds] Calliope Hummingbird--Denver

[Robert Righter]

Hi

We just had a female Calliope Hummingbird come to our flowering pots on our 
back porch. Quite aggressive. Came right up to my nose and began buzzing around 
the face looking me in the eyes. Luckily,  I survived.

Bob Righter
Denver, CO

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[cobirds] Re: Eastward Range extension.....

[Robert Righter]

Hi:

David Leatherman in his recent post pointed out detecting movement of 
traditional mountain and foothill species downslope to the plains. This 
phenomena has previously been posted on Cobirds this summer with observers 
commenting on how the mountain species are just not present in the numbers they 
use to be. Recently I was birding in Grand Co. and the sparsity of mountain 
species was impressive, the forests were very quiet.
One possibly explanation could be since the West has been so dry for quite 
awhile and the abnormally high heat has just sucked the moisture right out of 
the ground dramatically affecting the soil composition and thus effecting the 
health of the forest and consequently it’s bird life?  Any other thoughts? 

Bob Righter
Denver CO

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[cobirds] Common vs Pacific Loon

[Robert Righter]

Hi

An average  Common Loon is about twice the body size of a Pacific Loon. Usually 
in our reservoirs, at this time of year, there are many Western Grebes and  
just based on body size alone they are about equal  to a Pacific Loon. With 
just the right juxtaposition of a Common or Pacific Loon with a Western Grebe 
could also assist in a Common/Pacific Loon identification.

Bob Righter
Denver   

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[cobirds] Box Canyon Falls, Ouray, CO

[Robert Righter]

Hi all

Sandy and I just visited the amazing Box Canyon Falls, home for many years to 
the Black Swift. Reportedly nine swifts have returned this years although we 
didn’t see any. While at the  Falls I kept thinking of Rich Levad and all the 
outstanding work he accomplished locating Back Swift's nest sites.

Cheers,

Bob Righter
Denver CO 

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[cobirds] Congrats to the CFO board. Motus receiving stations are fantastic.

[Robert Righter]

Hi

Congratulations to the CFO board members for organizing the Colorado Birding 
Challenge. Raising more than $35,000 to contribute to the Bird Conservancy so 
they can build, install, and operate  Motus receiving stations. There are about 
1000 Motus stations from the Arctic to southern South American, tracking vital 
migration trends for migrating birds. There are numerous Motus stations in the 
Northeast and the information being gathered so far is astounding. This is a 
great tool for revealing where the pitfalls are for long distance migrating 
birds. Now thanks to the CFO and Bird Conservancy we’ll also have Motus 
tracking systems in the Rockies.

Bob Righter
Denver, CO

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[cobirds] Re: Changing Common Names of birds; example, Steller’s Jay

[Robert Righter]

Peter the Great,Tsar of all of Russia, invited Georg W. Steller, a German 
scientist to come to Russia and help explore and catalogue it’s natural 
history. In 1741 Steller joined the Vitus Bering Expedition in sailing east to 
discover what was out there. After several weeks   they bumped into new land 
now known as Alaska. Steller discovered a jay, now known as Steller’s Jay. The 
expedition sailed west exploring the Aleutians. Out of many of Steller’s new 
discoveries was a new eagle, now known as Steller’s Sea Eagle.

Doesn’t the eponymic name Steller’s Jay evoke more romance, interest, and 
wonder than if it was just called, for convenience, say “Mountain” Jay?

Bob Righter
Denver, CO  

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[cobirds] News from Cherry Creek SP

[Robert Righter]

Hi all

Sitting on the Bob Rozinski memorial bench while over looking the pond on 
cottonwood creek, I was able to fill Bob in on what was going on. During our 
spiritual  conversation 25 species of birds made an appearance including all 
three of the regular occurring teal and even a Black-crowned Night-Heron 
swooped over the cattails and gave its friendly “wonk” greeting. I wish now I’d 
brought along my camera as I’m sure Bob would have offered some tips on how to 
reduce the blur in my photos. If you are out birding Cherry Creek SP and feel 
like a little company  stop by and sit on the Bob Rozinski bench and check in 
and be sure to bring your camera. 

Bob Righter
Denver CO

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[cobirds] DFO's Zoom with Sheri Williamson

[Robert Righter]

Hi all

Two nights ago the DFO’s zoom meeting featured a talk about hummingbirds by 
Sheri Williamson—she was fantastic, extremely knowledgeable and entertaining.

Here are a few interesting tidbits I jotted down from her talk:
Hummingbirds are the smallest, warm-bodied creatures on earth !
Hummingbird’s brain, proportionate  to body size, is larger than the human 
brain to its body size, WoW

And as Sheri also pointed out there is now another reason to step outside and 
go birding is that the Amethyst-throated Mountain-Gem from South America is on 
the move now showing up in odd places in North America. Could Colorado be its 
next stop?

Bob Righter
Denver CO

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[cobirds] Spring Migration is Underway

[Robert Righter]

Spring Migration is Underway

Right this moment spring migration for North American land birds is well 
underway starting from South and Central America. Some of these migrants will 
just gradually move north, then use the Panamanian Isthmus follow the 
topographic features of Central America then entering North America. 

Eastern oriented birds are apt to take a long distance route over the Caribbean 
Sea before entering North America. At that time of year the prevailing winds 
are from the southeast, giving those migrants an added boost. Depending upon 
weather conditions their migration can be very exciting for bird watchers. 

Since there are few visible land features to guide them over the ocean 
migrating birds will rely on celestial cues, such as the sun and stars. In the 
northern hemisphere, the sun lies in the south and moves during the day from 
east to west, and at night the stars rotate counter-clockwise. (In the southern 
hemisphere, it is all reversed). For course direction they will rely on the 
degree of geomagnetic pull for re-orienting their course. Some of the 
over-the-ocean migrants will enter North America via the southeastern states 
and then move north, but most of the migrants will enter the country via the 
Gulf Coast states and then branch out in all directions north. Some like the 
Dickcissels will drift to Colorado for nesting. Many of Colorado’s nesting 
birds winter in Central America so their migration north in spring is shorter 
and is less dynamic, but equally as welcomed.

Bob Righter
Denver, CO

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Re: [cobirds] Digest for cobirds@googlegroups.com - 13 updates in 8 topics

[Robert Righter]

Hi Ira

Thats a nice remembrance about  Joe. 

Cheers, Bob 

> On Dec 3, 2020, at 1:20 AM, cobirds@googlegroups.com wrote:
> 
> cobirds@googlegroups.com 
> 
>   Google Groups 
> 
>
> 
>
> Topic digest  <>
> View all topics 
> 
> Joe Roller sad news  - 1 Update
> Swan at Barr Lake, Adams County  - 1 Update
> Volunteers Needed for the Colorado Birding Trail  
> - 1 Update
> Crowley County  - 2 Updates
> CFO Presents - Audubon's Christmas Bird Count in a Pandemic Dec. 5th 
>  - 1 Update
> Northern Parula in December  - 5 Updates
> Lesser Goldfinch + Rabbitbrush - Arapahoe  - 1 
> Update
> Roller Services Link  - 1 Update
>  <>Joe Roller sad news  
> 
>   
> Ira Sanders : Dec 02 10:54PM -0700 
> 
> On the afternoon of Friday, November 18, 2010, as I was driving Tammy to a
> doctor's appointment for outpatient surgery, I got a call from Joe about a
> rare bird that started something like "whatever you are doing, drop it and
> get to Cherry Creek Res RIGHT NOW. Don't ask questions, just go." Joe was
> always good about getting the word out on good birds but tended to get a
> little worked up about the urgency of getting there when calling with the
> news. I told him my situation and he said to "drop Tammy off at the
> hospital, she won't mind and go back later and get her." He then told me
> it was the Ross's Gull and I needed to get to Cherry Creek NOW. Being a
> Dr., I'm sure he figured I didn't really need to be there for the surgery
> and she'd understand. Very pragmatic. That was Joe. He then hung up and
> I discussed the situation with Tammy who had heard the conversation. She
> said I could drop her off as she knew how rare the gull is, but after a
> moment's thought, I went to the hospital and stayed there with her.
> The next day I got to Cherry Creek early and saw the gull and saw Joe and
> thanked him. He said I took a chance on the bird still being there. I
> said I know but added at least I was still married and avoided a fight.
> Tammy got the bird on Monday.
>  
> Ira Sanders
> Golden, CO
>  
>  
>  
>  
> -- 
> Ira Sanders
> Golden, CO
> "My mind is a raging torrent flooded with rivulets of thought cascading
> into a waterfall of creative alternatives."
> Back to top  <>Swan at Barr Lake, Adams County  
> 
>   
> "Johnson, Candice E., MD." : Dec 03 
> 02:07AM  
> 
> .
>  
> Today Tim and I braved the 23 degree temperature & scoped Barr Lake at about 
> 8:30 am. Sorry for the late post. Near the flock of 45 Pelicans across the 
> lake to the west was a swan, swimming alone. It had a small yellow area on 
> its face in front of the eye, with a black bill, but U vs. V shape could not 
> be determined at this distance. Probably the yellow area makes it a Tundra 
> Swan, but I hope others can confirm this. Also of note were at least 24 Bald 
> Eagles, clustered near one another on the ice in the center.
>  
> Candice Johnson, Denver
> --
> CONFIDENTIALITY NOTICE: This e-mail, including any attachments, is for the 
> sole use of Childrens Hospital Colorado and the intended recipient(s). It may 
> contain confidential and privileged information or may otherwise be protected 
> by law. Any unauthorized review, use, disclosure, or distribution is 
> prohibited. If you are not the intended recipient, please contact the sender 
> by reply e-mail and destroy all copies of the original message and any 
> attachment thereto.
>  
> --
> Back to top  <>Volunteers Needed for the Colorado 
> Birding Trail  
> 
>   
> Rachel Kolokoff Hopper : Dec 02 06:55PM -0700 
> 
> Colorado Parks & Wildlife is looking for volunteers. Here is the job 
> description:
>  
> https://drive.google.com/file/d/1rNIdVEo1Zo60una3QuHNCOaxFCRixvdr/view?usp=sharing
>  
> 
>  
> Sent from my iPhone
> www.rkhphotography.net
> Rachel Kolokoff Hopper
> Ft. Collins
> Back to top  <>Crowley County  
> 
>   
> Tom Wilberding : Dec 02 04:59PM -0800 
> 
> Hello birders,
>  
> No rarities to report, but if you’re thinking of looking for birds near 
> Ordway, Sugar City, or Lake 

[cobirds] Joe

[Robert Righter]

Hi:

I’m very sad about hearing of Joe’s passing. 

We’ve been friends for decades. Joe was a unifier, always bring people together 
for the benefit of the whole

Joe will be greatly missed.

Warmly,

Bob Righter
Denver CO 

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[cobirds] An explanation how European Golden-Plover made it to Maxwell NWR, NM

[Robert Righter]

As reported by television station KRQE, Albuquerque, New Mexico, on October 
1st, 2020, a European Golden-Plover was discovered at Maxwell National Wildlife 
Refuge, twenty five miles south of the Colorado border.

The core of the European Golden-Plover breeding range extends from Iceland 
across northern Europe to central Russia, and its winter range is from Great 
Britain, western Europe and north Africa to Asia. Significant numbers of 
Golden-Plovers that breed in Iceland, which would be the closest breeding range 
to North America, originated from their wintering grounds in Great Britain, 
western Europe, and western North Africa.

It is known that some spring migrants heading to Iceland become disoriented and 
instead of landing in Iceland, and with the help from the prevailing north-east 
winds, will continue until they find the first land. Many times this would be 
North America, mainly Newfoundland, Canada, where most of the European 
Golden-Plovers have been recorded. Where they go after that is not known; 
however it is strongly suspected  the Golden-Plovers that make first land in 
the Canadian polar latitudes would then be aided in traveling further west by 
an east-to-west prevailing winds. It is also thought that since there are very 
few European Golden Plover records in Alaska, that those Alaskan records could 
actually have been birds originating as Iceland-Greenland over shoots and not 
from individuals drifting over from Asia. It is unlikely therefore that the 
Maxwell NWR European Golden-Plover originated from Asia.

Now let us assume, by whatever route, a European Golden-Plover made its way to 
the central interior of Canada during summer. Food is abundant and there are 
other shorebirds around sharing information. Since most of its needs are met, 
there would be little advantage continuing to fly further west particularly 
over those forbidding Rocky Mountains. Summer is now winding down, food is 
becoming scarce, frost is entering the ground and the Golden-Plover’s internal 
biology is suggesting that it is time to move south. Following the eastern edge 
of the Rocky Mountains offers a reasonable path south. After many stops for 
food and rest the plover flies over the Colorado-New Mexico border, starts 
descending and shortly has landed at Maxwell National Wildlife Refuge, where 
many cameras are now authenticating  its presence. This incredible sighting 
represents the first interior record for North America, the first record for 
New Mexico, and the almost first record for Colorado. 

Sources:
Howell, N. G. Ian Lewington, Will Russell. 2014. Rare Birds of North America. 
Princeton University Press. 41 William Street, Princeton, New Jersey.

Newton. 2008. The  Migration Ecology of Birds. Academic Press: London

Bob Righter
Denver CO

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[cobirds] Roger Linfield

[Robert Righter]

Hi

I only met Roger a few times but I’m impressed on how much he meant to other 
people, he had to be a remarkable person. As was suggested a donation was made 
to the Community Foundation of Boulder in honor of Roger.

Bob Righter
Denver CO

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[cobirds] CCSP--Scoter and Loons

[Robert Righter]

Hi all

1 White-winged Scoter/ (f-imm)—in southern half of res.
2 Pacific Loons—I in northern half and 1 in central
1 Common Loon in northern half

Good assortment of winter ducks, 4 grebe species, lots of Bonaparte Gulls.

Bob Righter
Denver CO

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[cobirds] CCSP, shorebirds, Rusty Blackbird

[Robert Righter]

Hi
2 female Red-breasted Mergansers
10-15 Hooded Merganser
10 ad Bonaparte’s Gull
1 Common Loon

>From sw corner 
2 jv Black-bellied Plovers
2-3 Pectorial Sandpipers
3 jv. Long-billed Dowitchers
1 Baird’s Sandpiper
2 Wilson’s Snipe
1 RUSTY BLACKBIRD

Bob Righter
Denver CO


Sent from my iPhone

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[cobirds] Sabine's Gull, Juvenile CCSP

[Robert Righter]

Hi

The gull was swimming in the middle part of the southern half of the reservoir, 
never flew. First seen about 10:30 this morning.

Bob Righter
Denver CO

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[cobirds] Curious about the European Golden-Plover

[Robert Righter]

Hi

In North America most spring records of the European Golden-Plover, have 
occurred annually in Newfoundland with a high count of 350 individuals in 1988. 
It is suggested the European G-P were mis-oriented or blown westward from their 
intended summer destination of Iceland. In fall there is just a handful of 
records from northeastern North America and several fall records from Alaska 
thought to have occurred from Icelandic migrants drifting eastward following 
the prevailing winds in the arctic. (Rare bird of North America, Howell, 
Lewington, & Russell-2014).

Looking at the few pictures of a Golden Plover from north-central New Mexico, 
based on the ratio of the head and bill and the suggestive white showing from 
the underwing this bird may prove to be an European Golden-Plover. Looking at 
its history of vagrancy it doesn’t seem possible or does it? Could the Golden 
Plover arriving to North America in the spring kept traveling westward and 
summered somewhere in the Arctic and then in the fall headed south to be 
spotted in NM. Is there any update on the status and identity of the Golden 
Plover from NM?

Bob Righter
Denver CO

 

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[cobirds] Have call of European Golden-Plover

[Robert Righter]

Hi

Two summers ago, while in Iceland, I recorded the call of the European 
Golden-Plover-not great but also not that bad of a recording. Let me know if 
anyone is interested and I’ll try to figure a way of sending it to you. Or 
maybe if someone has the ability to post the sound could be even a better 
approach.

Bob Righter
Denver CO


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[cobirds] Sabine Gull CCSP

[Robert Righter]

Hi
Minutes ago viewed a juvenile Sabine Gull from Lake Loop. Another juvenile 
Sabine Gull viewed to the east, looking at swim beach. Could be same gull but 
watch for two

Bob Righter
Denver CO

Sent from my iPhone

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[cobirds] Yellow-throated Vireo, Denver

[Robert Righter]

Hi

I just got a report, including a photo, of a dead Yellow-throated Vireo, from a 
friend living in Denver 

Bob Righter
Denver, CO

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[cobirds] Ruff/Buff-bellied

[Robert Righter]

Hi

Based on the following subjective field marks I would also vote for Ruff

Dark feathers around the head
Thicker base to bill 
Josh’s photo suggests that hump-backed look featured for  Ruff

Bob Righter
Denver CO  

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[cobirds] Caspian Tern--Barr Lake

[Robert Righter]

Hi

In the southwest section of Barr Lake;
One adult being harassed by a squawking  juvenile

Lots of the usual shorebirds present.  A large flock, 30-40 Stilt Sandpipers 
was a treat

Bob Righter
Denver CO

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[cobirds] Re- Cliff and Cave Swallow

[Robert Righter]

What a wonderful, illuminating discussion we are having on Cobirds

David Tonnessen alludes in his recent posts in the difficulty in separating 
juvenile Cliff swallows from juvenile  and perhaps adult Cave Swallow. 

Tony’s post, in part, concurs with that premise but suggest that phase of 
juvenile plumage may not be that prevalent?

In the Sibley Guide the notation adjacent to the depiction of the juvenile 
Cliff Swallow (Jun-Dec) “juveniles extremely variable…”

So what do we do about this dilemma in Colorado. Could we just say that any 
well documented record of a Cave Swallow before June would be more viable than 
any juvenile record of a Cave Swallow discovered after June which would to have 
to have an exceptional level of documentation. Would even photographic evidence 
be satisfactory or would it take just  specimen evidence?

Bob Righter
Denver CO 

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[cobirds] Shorebirds at Barr Lake

[Robert Righter]

Hi

At 06:15 am I arrived at Barr Lake just as the Great Eastern Sun began to rise. 
With the sun behind me I began to look for shorebirds along the southeastern 
shore. Most of the shorebirds were in there juvenile, neat and tidy appearing 
plumage.

Avocet 8-10
Killdeer 60 +
Marbled Godwit 10-13
Baird’s Sandpiper 40 + 
Least Sandpiper 15-20 (juvenile and adult plumage)
Semipalmated Sandpiper 10-15
Spotted Sandpiper less than 10
Solitary Sandpiper 5-8
Lesser Yellowlegs 20-25
Greater Yellowlegs (just heard) 4-6
Wilson’s Phalarope 5-8

At 8 o’clock it began to get hot and I left
I can only wonder what the list could have been if I’d walked  the shore all 
around Barr Lake

Bob Righter
Denver CO


 

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[cobirds] Re-Bird sound quizz

[Robert Righter]

Hi

I’m now 0 for 5 with these bird sound quizzes, When is the next one?

Bob Righter
Denver CO

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[cobirds] Re Mike Britten's bird song quiz

[Robert Righter]

Hi all

After going 0 for 4 on these  bird song quizzes and risking being sent off to 
the minors for some extensive audio re-tooling, I’ll take another swing.

Since the Cassin’s Finch has a numerous call types, I think in the past I've 
recorded a call similar to Mike's quiz bird !!

Bob Righter
Denver CO




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[cobirds] Snowy Range, Wyoming

[Robert Righter]

If you are thinking about birding RMNP this summer but are not sure of your 
reservation status for entering the Park or just not wanting to battle the 
crowds, think about visiting the Snowy Range in south central Wyoming. The 
Range is about forty miles north of RMNP or about a three hour drive from 
Denver.The Snowy Range shares similar geology and habitat with the Park. The 
base elevation of Centennial, WY is about 8200’ as compared to 7500’ for Estes 
Park resulting in corresponding cooler temperature. Based on the hikes Sandy 
and I have taken, it appears there is more and easier access to the spruce-fir 
forest and the tundra zone starts about 10,500, considerably lower than at 
RMNP. In 2018 a California Condor, number 72, visited the tundra in the Snowy 
Range and who knows what else could show up! 

Bob Righter
Denver CO

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[cobirds] Lewis's Woodpecker

[Robert Righter]

Hi

On June 30, Courtney Schultz alerted all us on Cobirds that there were Lewis’s 
Woodpeckers at Hewlett Gulch, along the Poudre River in Larimer Co. Today I 
spent a few early morning hours audio recording those woodpeckers. If anyone is 
interested in either photographing. recording or just watching these unusual 
woodpeckers, this is a great location. They are in tall bare trees visible from 
the parking lot, but by walking down the trail can get relatively quite close 
to them.

Bob Righter
Denver CO  

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[cobirds] Birding in Jackson County

[Robert Righter]

Are you wondering where your next birding adventures will be? How about Jackson 
County? It is one the few counties in Colorado where Covid19 has not paid a 
visit.The county has an assortment of critters, 1400 folks, 600 moose, 
pronghorns, 2500 cattle and over the years 272 bird species have been tallied 
(CFO). The county is bounded to the west by the specular Park Range and to the 
east by the Medicine Bow mountains. Sage is the dominate vegetation within the 
county. Arapaho NWR maintains jurisdiction over a good portion of the wetlands 
in the central valley and provides an impressive auto tour that snakes its way 
through lakes and ponds. This is where Sandy and I discovered sixteen species 
of ducks as well as many other water oriented birds. We spent several days in 
the preserve and never saw another car except for one distant NWR truck. 
Driving the unpopulated county roads, all one sees are these gentle rolling 
sage brush covered hills for miles. The county has impressive State Wildlife 
Areas and Walden Reservoir SWA has several hundred nesting White Pelicans, 
California Gulls, and Eared Grebes in flashy breeding plumage. There is lots to 
look at in Jackson County.

Bob Righter
Denver CO

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[cobirds] The Rare Bird Alert

[Robert Righter]

Hi

I like the RBA on Cobirds. With one quick click and I immediately get a quick 
snapshot of what its going on in our state. The RBA is much more than just rare 
birds. It also includes out of season and out of range reports, unusually high 
counts. For example today there were six Black Swifts and a Eastern Wood-Pewee 
seen at Pueblo Res. To me that is interesting information. For more information 
about a post, just click on the poster’s email. Just looking at all the unusual 
sighting per county I find very stimulating.

My question is can I click on ebirds and obtain the same information as quickly 
as I can on the RBA?

Bob Righter
Denver CO 



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[cobirds] Common Nighthawk--Denver

[Robert Righter]

Hi

Probably not that unusual of a sighting, but what could be unusual was that it 
was resting on a small bare branch, forty to fifty feet up in a dense spruce 
tree in our backyard. Makes one wonder how often does this happen and if so 
could there be more Common Nighthawks migrating through urban Denver than we 
estimate? 

Bob Righter
Denver CO 

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[cobirds] Cherry Creek SP--Ash throated Flycatcher

[Robert Righter]

Hi

The Ash-throated Flycatcher was seen two hours ago. From the Prairie Loop 
parking area, after crossing the bridge over Cotton Wood Creek, several hundred 
yards along the path the bird was seen and heard in the tall trees left of the 
path

Also from Prairie Loop a Plumbeous Vireo was seen near the water at the 
observatory area

Bob Righter
Denver CO

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[cobirds] Cherry Creek SP--Blackpoll Warbler

[Robert Righter]

Hi

Seen about two hours ago, along the east side the South Connector trail, about 
50 yards in from the trail entrance from the main driving road

Bob Righter
Denver CO 

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[cobirds] Re a 20 warbler day in Colorado

[Robert Righter]

Hi

Just to underline how impressive Brandon’s report is in seeing 20 warbler 
species in one day in southeast Colorado. This would be a remarkable feat 
anywhere in North American, perhaps aside from Louisiana, Texas and a few other 
states.

Congratulations to everyone involved

Green with jealously ,

Bob Righter
Denver, CO 


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[cobirds] Red-breasted Nuthatch possible nesting Pawnee NG

[Robert Righter]

While at the Pawnee National Grasslands, Weld Co., saw a Red-breasted Nuthatch 
entering a possible nesting cavity at Norma’s Grove, (40-42-39N: 104-31-3W).

At Norma’s Grove detected 24 species of birds, which was many more birds than 
was seen on the three hour Auto Tour loop!

Bob Righter
Denver CO

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[cobirds] Cherry Creek SP, Marsh Wren

[Robert Righter]

Hi

Marsh Wren singing in the cattails at the pond adjacent to the road on the 
westside

Bob Righter
Denver CO

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[cobirds] Palm Warbler Cherry Creek SP

[Robert Righter]

Hi

The warbler was first seen this morning at about 08:30 on the west side in the 
marsh area just south of Lake Loop. First seen by Mitchelle Bailey, then Joey 
Negreann obtained a photo, and later I got a quick glimpse.

Bob Righter
Denver, CO 


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[cobirds] Eastern Screech-Owl

[Robert Righter]

Hi 

My wife Sandy in walking our spaniel around the neighborhood heard two  
separate E. Screech-Owls vocalizing during the day. They seem to be  active 
now, at least in the greater DU area in Denver.

Bob Righter
Denver CO

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[cobirds] Suspending the rare bird alert ?

[Robert Righter]

Hi

Spring migration is one of the most exciting times of the year for birding in 
Colorado. 
One way we  are made aware of the progress of migrations is by noting the wide 
variety of species as well as the volume of migrating birds through our state 
via  Cobirds. 
A rare species is a rather subjective label, rare to one birder is not so rare 
to another birder depending on season and location. We all have a choice to 
chase or not to chase or just  observe the action on Cobirds.

Bob Righter
Denver, CO 


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[cobirds] Favorite Songs of Spring

[Robert Righter]

Hi

After a long winter hearing the first  Western Meadowlarks bugling in spring 
gives me reassurance that winter is on the way out. Hearing the gurglings from 
the first Lark Buntings in May lets me know Summer is fast approaching, Hearing 
trumpeting from the first Sandhilll Cranes migrating south in fall lets me know 
winter is on the way.

What would we do without hearing bird songs?

Cheers,

Bob Righter
Denver Colorado

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[cobirds] Introducing Cole Sage

[Robert Righter]

HI

Cole Sage is a newer birder to our community. Cole is 16, very thoughtful,  
enthusiastic, and best of all is hooked on birding. Cole already has an 
interesting birding blog about some of the birds seen on his trips:  
http://birdsonthewing.com/ .

Bob Righter
Denver CO


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[cobirds] Variation

[Robert Righter]

Hi:

I’m not necessary a “Guller” but I am a believer in variation. There is 
probably more variation within a species than we like to believe. Darwin was 
constantly confused by variation and I think that theme is still with us today 
particularly  obvious within the Large-white-Headed Gull group.

Bob Righter
Denver CO 

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[cobirds] Van Truan 405 Pueblo County list

[Robert Righter]

Hi:

That's an amazing, county record for Colorado, an inland state, rivaling some 
of those west coast county records.

Cheers, 

Bob Righter
Denver CO

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Re: [cobirds] Overeager, Arapahoe County

[Robert Righter]

Hi

I just penned a short article for the Lark Bunting, should be in the February 
issue, about a whooper of a mis-id I made many years ago. It’s taken me over 40 
years to finally come to grips with that excruciatingly embarrassing call.

Stay tuned, more to come 

Cheers, Bob

> On Jan 16, 2020, at 9:31 AM, Mary Kay Waddington  
> wrote:
> 
> OK, I don't really want to turn this forum into a list of everyone's 
> "NotABird" stories, because we've all had them -- but I couldn't resist this 
> one.  When Charlie Chase was Curator of Ornithology at the museum (and I a 
> lowly bird-skinner) we were out birding one day and passed by a road kill.  
> We both agreed immediately that it was a Short-eared Owl!  So we slammed on 
> the brakes and backed up the road to pick it up  ---  Sheep's head.
> 
> Mary Kay Waddington
> 
> On Thu, Jan 16, 2020 at 8:09 AM Sebastian Patti  > wrote:
> Chlorox  bottles hiding in corn stubble in mid-winter can closely resemble 
> SNOWY OWLS . . .
> 
> Trust me . . . 
> 
> sebastianpa...@hotmail.com  
> Sebastian T. Patti 
> 770 S. Grand Avenue
> Unit 3088
> Los Angeles, CA 90017 
> CELL: 773/304-7488
> 
> From: Joe Roller mailto:jroll...@gmail.com>>
> Sent: Thursday, January 16, 2020 8:08 AM
> To: Colorado Birds  >
> Cc: twilberd...@comcast.net  
> mailto:twilberd...@comcast.net>>; Bob's Email 
> mailto:rorigh...@earthlink.net>>; Sebastian Patti 
> mailto:sebastianpa...@hotmail.com>>
> Subject: Re: [cobirds] Overeager, Arapahoe County
>  
> Good photo documentation of the seldom seen hybrid, "Loon x Grebe".
> Joe Roller
> 
> PS Cobirds is chock full of serious bird reports, so it's refreshing to find 
> one like Tom's
> that screams "Beware! I goofed! So can you!"
> 
> Here's the tale of the worst ID I ever made. 
> A DFO trip to South Texas, led by the stalwart Bob Righter, found our group 
> on the ferry ride across Galveston Bay.  
> Bob had just told us to be alert, as this leg of the trip offered our only 
> chance for Brown Pelican. I was excited 
> and determined to be the first to spot one. 
> "Brown Pelican!" I yelled out, agitated and excited. "Two o'clock on the far 
> shore!"
> Bob glassed the spot I pointed to and calmly asked, "Joe, where is it from 
> that German Shepherd?"  
> My meek reply, "Oh, well. Never mind. He was scratching himself and got into 
> a shape like a Brown Pelican.
> I'll keep scanning." 
> 
> Roger Tory Peterson led a field trip to a Bronx shore one winter. He called 
> out "Mountain Bluebird!"
> It turned out to be a half-buried Bromo-Seltzer bottle.
> 
> I suppose that bone-head calls like that happen to most of us from time to 
> time, but who will admit it?
> Who else has stories like those?
> 
> 
> 
> On Wed, Jan 15, 2020 at 8:32 PM Sebastian Patti  > wrote:
> Overeager and maybe just a tad too GREBEY!!
> 
>  . . . sorry . . .
> 
> sebastianpa...@hotmail.com  
> Sebastian T. Patti 
> 770 S. Grand Avenue
> Unit 3088
> Los Angeles, CA 90017 
> CELL: 773/304-7488
> 
> From: cobirds@googlegroups.com  
> mailto:cobirds@googlegroups.com>> on behalf of Tom 
> Wilberding mailto:twilberd...@comcast.net>>
> Sent: Wednesday, January 15, 2020 8:59 PM
> To: Colorado Birds  >
> Subject: [cobirds] Overeager, Arapahoe County
>  
>  Hi all,
> This afternoon I was at windy Aurora Reservoir looking for the often-reported 
> Yellow-billed Loon. I went down to the beach and started scanning with my 500 
> mm camera lens. I spotted three Common Loons way out there , but then 
> realized they were Common Mergansers. That should have been a warning to me.
> 
> After a long while I feared I would dip on the YBLO, but suddenly, out of the 
> corner of my eye, there it was. Wow! Swimming along pretty close to shore 
> between the waves. It looked maybe a little too brown and the bill looked a 
> little small, but “WHAT ELSE COULD IT BE?” I took about 100 photos and felt 
> triumphant. 
> 
> Later at Starbucks I zoomed my camera screen in close to appreciate the 
> subtleties of a Yellow-billed Loon. Below what I saw. Truly jaw-dropping.
> 
> Better birding next time,
> Tom Wilberding
> Littleton, CO
> 
> 
> 
> <_V6A1103.jpg>
> 
> 
> 
> 
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>  
> 

[cobirds] Common vs Yellow-billed Loon

[Robert Righter]

Hi:

Two days ago I was birding Cherry Creek Reservoir looking for the Yellow-billed 
Loon that was previously reported. About half way across the southern portion 
of the reservoir a loon was spotted. Because of heat waves the only impression 
that registered with me was the head was light brownish and the bill, appearing 
through shimmering light, was light colored.

I checked with Cornell Lab of Ornithology, Birds of North America series (an 
excellent resource) to see what the latest word was in distinguishing the 
difference between the Common and Yellow-billed Loon. Here is a brief summery 
of what I found 

Because of sexual and age  variation in size between the two loon species, it 
would be challenging just using size as a distinguishing characteristic for 
either loon. Also because of the subtle variation in plumage for juveniles and 
non-breeding adults for both loons relying on appearance is tricky although 
could be highly suggestive for the Yellow-billed   

"Only characteristic diagnostic in all plumages and ages is color of culmen 
(ridge of upper mandible). In Common Loon in winter plumage this ridge and 
about 5 mm on either side is black (in breeding plumage the entire bill is 
black), but in Yellow-billed Loon at least the distal half and usually distal 
two-thirds is whitish-yellow" (Common Loon BNA series)

Bob Righter
Denver, CO

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[cobirds] Northern Shrike River Bend Ponds Ft Collins

[Robert Righter]

Hi

Seen in the northwest section of Big Pond at about 3:30 pm

Bob Righter
Denver CO

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[cobirds] 6 Grebe Day ??

[Robert Righter]

Hi

Today at Cherry Creek SP the tally was 5 grebes species: Western, Clark’s. 
Horned, Eared, and Pied-billed, which made me wonder if anyone has ever had a 6 
grebe day on one body of water in Colorado, which would be quite an 
accomplishment.  

To have a 6 grebe day has to include the Red-necked which of course is possible 
but more likely later in the season, but later in the season runs the risk of 
missing the Clark’s.

I would imagine that Pueblo SP would have the best chance of have a 6 grebe 
day,  but maybe others have already experienced a 6 grebe day on one body of 
water ?

Let us know

Cheers

Bob Righter
Denver CO

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[cobirds] Jaeger sp. Warren Lake Fort Colins

[Robert Righter]

Hi:

An adult, light-morph Pomarine/Parasitic Jaeger seen about 10 minutes ago, 
bathing in the middle of the larger portion of Warren Lake.

If it was a Pom it’s characteristic longs twisted tail feathers were either 
broken off or molted away. The dark helmeted head feathers appeared to come 
below it’s bill and it’s mantle was dark, no tones of brown.. It was difficult 
to assess  the shape of it’s remaining tail feathers. In some looks the tail 
feathers seemed pointed and in other looks, not so sure.

Bring the long lens

Bob Righter
Denver, CO  

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[cobirds] News from Barr Lake Adams Co 10/2

[Robert Righter]

Because one can walk out on the sand towards the water's edge, makes it very 
easy for close viewing of the birds.

Just in the southeast section:
3 American Golden-Plovers, (at least one was a Jv.)
50+ Killdeer
2 Marbled Godwits
3 Jv. Sanderlings
20 Baird’s Sandpipers
3-4 Pectorial Sandpipers
1 Least Sandpiper
20+ Forster’s Gulls

1000’s of Barn Swallows and vast numbers of other regularly occurring 
waterbirds were present
If there was more time I’d visit Meredith at Conservancy Banding station. It 
would have been fun to see the Philadelphia Vireo

Lots going on at Barr Lake, Come on out!

Bob Righter
Denver, CO


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[cobirds] Barr Lake, Adams Co

[Robert Righter]

Highlight:
American Golden-Plover, in immaculate juv. plumage, circulating between the 
southern and middle sections of the lake

There was an impressive quantity of waterbirds on the lake today, the most 
numerous--listed by volume:
American  White Pelican 1000
Double-crested Cormorant less than a 1000
Ringed-billed Gull 400
Killdeer 350
American Coot, 325
Ruddy Duck 250
Shoveler Duck 200  

Others of note:
Sanderling, juvenile,1
Baird’s Sandpiper, juvenile 40
Lesser Yellowlegs several
Long-billed Dowitchers; 40

Bob Righter
Denver, CO


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[cobirds] Another excellent Hummingbird Guide

[Robert Righter]

Hi

Kaufman Field Guide to Advanced Birding  is an excellent guide. There is  over 
30 pages devoted to just the 8 most challenging hummingbird species. Also a few 
years ago John Vanderpole published an excellent video guide, along with John 
Dunn, on North American Hummingbirds

Cheers,

Bob Righter
Denver, CO


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[cobirds] Timberline Sparrow ??

[Robert Righter]

Hi

Just reading Peterson Reference Guide to Sparrows of North America (2019) by 
Rick Wright, apparently on page 321, Timberline Sparrow (Spizella Taverneri), 
previously a subspecies of the Brewer’s Sparrow has been elevated to a species. 
A brief search of the internet didn’t produce any information to this effect so 
I’m not sure how this subspecies gained species status.

Here is what is stated in reference to Colorado; Still mysterious is the summer 
occurrence of Timberline-like sparrows in suitable breeding habitat at high 
elevations in the Colorado Rockies; it is not certain whether these birds are 
in fact Timberline Sparrows—or the altitudinal range of the Brewer Sparrow…

If this information is true the Timberline Sparrow would automatically ascend 
to first place as being the most difficult species to identify in Colorado if 
not for North America.

Anyone have any more information about the Timberline Sparrow status?

Bob Righter
Denver CO

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[cobirds] Including age when reporting rare gulls

[Robert Righter]

Hi:

It could be helpful to birders when reporting rare birds to include the age of 
the bird, particularly with gulls, notable the large, white-headed gulls, also 
helpful when reporting terns, and very important when reporting Jaegers. These 
categories of birds arrive sporting a multiple array of confusing plumages so 
if age is also included with report birders will know more what to look for.

Hope this is helpful

Bob Righter
Denver, CO

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[cobirds] Cobirds vs Facebook

[Robert Righter]

Hi

Leon Bright makes a good point. For almost 30 years Cobirds has been the 
established platform for communicating all kinds of interesting birding news 
about what is  going on in the state
By promoting the advantages, or perhaps its
disadvantage of using Facebook as a platform (check out facebooks recent stock 
collapse) for disseminating bird information could have the effect of 
splintering, or complicating how we get the daily bird news. Is this what we 
want?

Are there ways of making Cobirds more relevant to changing times ?

Bob Righter
Denver CO



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[cobirds] Rusty Blackbirds Cherry Creek Res

[Robert Righter]

Hi
In the southwest corner, about 100 yards north of the observation area was a 
male and female Rusty Black

Bob Righter
Denver CO

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[cobirds] Sexual Dimorphism for Northern Black Swift

[Robert Righter]

Hi all

An important paper was just published in the prestiges, ornithological journal, 
Western Birds—Sexually Dimorphic Plumages Characteristic  in the Northern Black 
Swift written by Colorado authors, Carolyn Gunn, Kevin Aagaard, Kim M. Potter, 
and Jason P. Beason. The paper, all of it’s science all taking place in 
Colorado, discusses the implication of the depth of the tail fork as an 
important feature in determining sexual differences.

The paper credits, in part, contributions made by the Denver Field 
Ornithologist, Education and Conservation Fund and the Colorado Field 
Ornithologist. Everyone reading this post is probably a member of one or both 
of these fine organizations.

Cheers, Bob  

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[cobirds] Shorebirds Cherry Creek Res (Arapahoe Co)

[Robert Righter]

Hi

In the southwest corner,
from the observation platform, were 4 Lesser Yellowlegs

About  2 football field lengths away, still in the southwest corner,
6-8 Yellowlegs, presumably, also Lesser Yellowlegs
1 Dowitcher species
1 Stilt Sandpipers

1 White-faced Ibis flew over the marsh

I Ferruginous Hawk flying over the dam

Bob Righter
Denver, CO

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[cobirds] Cherry Creek Res--Black-bellied Plovers

[Robert Righter]

Hi all:

>From the  observation area in the south west corner there were two juvenile 
>Black-bellied Plovers. One with white spotting on its black and the other with 
>gold spotting on its back.

Other notes of interest:
3-4 Snowy Egrets
1 Great Egret
3-4 juvenile, Black-crowned Night-Herons

Plus lots of Boats, all sizes and shapes

Bob Righter
Denver CO

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[cobirds] Great-horned Owls--started hooting (Denver Co)

[Robert Righter]

Hi

On recent, loosening up the back, evening walks around the greater DU area in 
Denver, I’ve detected Great-horned Owls hooting starting at 7PM and continuing. 
Actually I’ve heard them hooting, to a lesser degree, during the day. The 
extent of their hooting suggest they are already setting up territories, the 
end of September! Anyone else hearing them?

Bob Righter
Denver, CO 

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[cobirds] News from Crow Valley Campground

[Robert Righter]

Hi

The main campground area it was quiet. One contributing factor was at a camp 
site in middle of prime migrate habitat on the south west side was a large, 
Boxer/Mastiff with a ferocious sounding bark, convincing enough to have me 
scurrying back to the car, locking the car doors.

In the pasture just north of the campground there were some interesting bird 
comparisons. In an area including tall cottonwoods with dead branches were 
łabout 4-5 Olive-sided Flycatchers. Also there were 1-2 Western-wood Pewees in 
the area. It was interesting to study the size and flying comparisons for each 
Contopus species. Actually in the greater area there 4 times as many O-s fly as 
there were robins. Also had good views of side by side comparisons of Sage and 
Brown Thrashers

Bob Righters
Denver CO

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[cobirds] News from Crow Valley (Weld)

[Robert Righter]

Hi

No big wave of flashy migrants yet, although a camper-birder stated that a Palm 
Warbler was seen yesterday

During a delightful morning on birding tallying 33 bird species representing 18 
bird families— demonstrating an impressive convergence of evolution flying 
around the campground.

Bob Righter
Denver CO


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[cobirds] Great-tailed Grackle Cherry Creek Res

[Robert Righter]

Hi all

At the westside of wetlands, was 1 male Great-tailed Grackle,
Notables also at the wetlands:
Scores of Wilson’s Snipe in the wet fields adjacent to the wetlands 
2 Snowy Egrets
1 Black-crowned Night-Heron
6 male Yellow-headed Blackbirds

Bob Righter
Denver CO

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[cobirds] Cheery Creek Res--White-faced Ibis

[Robert Righter]

Hi all:

This afternoon a flock of about 25 White-faced Ibis swooped into the west side 
of Wetlands Preserve near the Observation Kiosk.

Bob Righter
Denver, CO 

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[cobirds] Little bit of history about the House Sparrow

[Robert Righter]

Hi All

In the last 25 years the House Sparrow has decreased 62% in the UK, In Canada 
they have decreased in the last 20 years, and in the Maritime Provinces in 
Canada declines have approached 90%

The House Sparrow in a tenacious beast. The Sumerians in 3000 BC labeled the 
House Sparrow as an enemy and a threat. In 1853 the House Sparrow was 
introduced into North America in Green-Wood Cemetery in Brooklyn NY and by the 
1870s the species had established itself in every state east of the Mississippi 
River and in 1895 the first record for Colorado occurred in 1895 at Pueblo.

Good times don’t last forever and perhaps we are experiencing a temporary 
population re-adjustment?

Bob Righter
Denver CO

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[cobirds] Greater White-fronted Geese-Fort Collins Larimer Co

[Robert Righter]

Hi

At 06:30 I heard and saw 30 Greater White-fronted Geese, flying south (?), over 
 Warren Lake in Fort Collins.

Bob Righter
Denver Co

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[cobirds] Car break-in Riverbend Ponds Larimer Co

[Robert Righter]

Hi

A SUV was broken into at the parking lot at River Bend Ponds Natural Area east 
of Fort Collins. The back, side window was busted in and according to the lady 
occupant they got her hand bag, containing wallet, ID money, driver license, 
phone, the works. She had no ID indicating who she was!

Just recently Hugh Kingery reported a break in at Wheat Ridge Greenbelt. So 
there seems to be a trend occurring with break ins at recreational-birding 
area's parking lots.

This happened to me while birding in Moss Landing, California several years 
ago. Apparently not all the surfers on top to the sand dunes were looking for 
the perfect wave, others were looking for more lucrative opportunities.  Lost 
new Lieca scope and new fancy tripod, My wife lost her hand bag containing two 
much money, driver’s license  binocs— the works

Please be aware when birding of all parking lots.

Bob Righter
Denver CO  


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[cobirds] Possible Sagebrush Sparrow Cherry Creek SP

[Robert Righter]

Hi:

This afternoon, approximately 2 pm, while walking the path to Beaver Ponds, on 
the eastside  of the wetlands, a sparrow popped out from the adjacent shubs, 
about 20 yards away and perched in the interior of the shrub. The throat of the 
sparrow was clean white. Side of the throat was thin darkish stripe, (lateral 
throat stripe). Adjacent to that stripe was a clean white malar stripe. The 
head appeared a neutral brown tone  with what I thought included some grayish 
tones. The tail was longish and was occasionally flicked up and down. I kept 
waiting a second, more confirming look, but that never happened, consequently 
this unusual  sighting for Cherry Creek Res. should be a listed as possible, 
maybe others will also see this sparrow or even better snap a convincing photo.

Bob Righter
Denver, CO   

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[cobirds] Re: Suggestion books on Migration

[Robert Righter]

Another book about migration and birds is Migration Ecology of Birds by Ian 
Newton. Unfortunately the book is a bit thick, but very thorough on the reasons 
different birds migrate or partially migrate depending upon location or not 
migrate but then start to migrate, and lots on how they navigate during 
migration. Fortunately the text is well written so it’s easy to comprehend. 
Lots of WOW and OMG, moments.

Bob Righter
Denver CO

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