Date: Tuesday, May 19, 2020
Email: RBA  AT cobirds.org
Compiler:  Allison Hilf, ahilf AT me.com
Phone:  (303) 888-5110
______________________________________
 
The Colorado Rare Bird report is an informational service. 
 
Because of statewide coronavirus “Safer at Home” orders, this report is meant 
to keep homebound readers abreast of rare bird sightings across the state 
during spring migration. It does NOT endorse and is NOT meant to encourage the 
pursuit of rare birds beyond your local area.
 
We urge readers to respect state and local restrictions on non-critical travel.
As potentially asymptomatic outside visitors, unethical urban/suburban “chase” 
birders who travel to more remote locales may risk exposing isolated Colorado 
populations to the virus.
 
To ensure your safety and that of others while birding, do the right thing. 
Please practice physical distancing, wear face masks and follow all other 
Covid-19 precautions.
_______________________________________
 
Birders have been helpful by reporting updates to COBirds. Thanks!
CAPITAL LETTERS denote very rare species, as listed by the Colorado Bird 
Records Committee at the CFO website.  The Committee requests you please fill 
out a report for sightings of these birds.
(*) indicates new information on a species.
For more information on birds seen today, go to cobirds.org and scroll to the 
bottom for “Recent eBird Sightings.”
_______________________________________
 
Spring migration notes
Colorado’s remarkable 2020 neotropical warbler migration (more than 25 species 
considered rare here) ended just in time for my week to compile the Rare Bird 
Report; good for me, but not quite as exciting for everyone. 
The past few days the most popular migrants were Flycatchers (the past few 
weeks we’ve had Alder, Ash-throated, Dusky, Hammond’s, Gray, Great-crested, 
Least, Olive-sided, Scissor-tailed, Vermilion and other more common migrants 
and breeders).
Black Phoebes were “hot” a few weeks ago, but only 1 report yesterday.
Many warblers, tanagers, vireos, thrushes (including Wood  and  Gray-cheeked 
Thrushes) are still moving and orioles (including Scott’s and Baltimore 
Orioles) and lots of grosbeaks are showing up at feeders and in yards.
Shorebird sightings have declined, with fewer adults and more fledglings being 
reported.

Note: In an attempt to limit an already-overlong daily report, we are omitting 
most reports of these recently listed species from the daily report (exceptions 
being when they are extremely rare for a given county):
Gray-cheeked Thrush, Northern Waterthrush, Black-and-white Warbler, Tennessee 
Warbler, Nashville Warble, Hooded Warbler, Northern Parula, Chestnut-sided 
Warbler, Blackpoll Warbler, Palm Warbler,, and Summer Tanager.
Please continue, however, to report these birds and other finds on COBIRDS.
 ___________________________________
 
Rare birds and some out-of-place or out-of-season birds include:

MEXICAN WHIP-POOR-WILL (Fremont, SE CO)
BLACK VULTURE (*Pueblo)
ANNA’S HUMMINGBIRD (Jefferson)
Least Tern (Mesa)
BLACK PHOEBE (*Rio Grande)
Vermilion Flycatcher (SE CO)
Scissor-tailed Flycatcher (Jefferson)
Philadelphia Vireo (Larimer)
Winter Wren (Jackson)
Sedge Wren (Weld)
Wood Thrush (Lincoln, SE CO)
McCown’s Longspur (Larimer)
Field Sparrow (Douglas, Larimer)
White-throated Sparrow (Yuma)
Swamp Sparrow (Archuleta)
EASTERN MEADOWLARK (Lilian’s) (*Larimer)
Baltimore Oriole (Custer, Jefferson)
SCOTT’S ORIOLE (Broomfield)
LOUISIANA WATERTHRUSH (Jefferson)
Golden-winged Warbler (El Paso, Jefferson, Larimer)
Blue-winged Warbler (El Paso, *Fremont)
Mourning Warbler (Jefferson, Larimer, Yuma)
Blackburnian Warbler (Denver, *Larimer)
Black-throated Blue Warbler (Cheyenne, SE CO)
Pine Warbler (Jefferson)
Yellow-throated Warbler (Jefferson, Pueblo)
Magnolia Warbler (*Arapahoe, Cheyenne, Denver, Elbert, El Paso, Larimer)
Bay-breasted Warbler (Larimer, Pueblo)
Black-throated Gray Warbler (Broomfield, Denver, Jefferson, Pitkin, SE CO)
Scarlet Tanager (El Paso, *Rio Grande)
Northern Cardinal (Boulder)
____________________________________
 
SOUTHEAST COLORADO:
Rare Birds located within Baca, Bent, Kiowa, Otero and Prowers Counties are 
listed below without location in an effort to limit the temptation for more 
birders to chase birds being found primarily by Front Range Birders traveling 
to these small communities in violation of statewide “safer at home” 
regulations.   Anyone living in the vicinity wanting detailed location 
information may e-mail or phone Compiler.
—MEXICAN WHIP-POOR-WILL; Vermilion Flycatcher; Wood Thrush; Worm-eating 
Warbler; Black-throated Blue Warbler; Black-throated Gray Warbler; Painted 
Bunting.

ARAPAHOE COUNTY:
—On May 18 a Magnolia Warbler was reported at Cherry Creek State Park on the 
south end near the marshy area of Lake Loop by Cynthia Madsen.

ARCHULETA COUNTY:
—On May 15 a Swamp Sparrow was reported at Navajo SP, Ignacio by James Beatty.  
There are no previous eBird reports for this species in Archuleta County.
 
BOULDER COUNTY:
—On May 17 a Northern Cardinal was reported in a yard near 21st and Meadow 
Avenue, Boulder by  Neil Reinecke. Apparently the same bird was seen as early 
as May 9 on Meadow and also near 21st and Linden Avenue.
 
BROOMFIELD COUNTY:
—On May 16 a Scott’s Oriole was reported last week at a private residence near 
Colorado Hills Open Space by Nancy Matovich.
—On May 14 a Black-throated Gray Warbler was reported at Alexx & Michaels Pond 
by Chipper Phillips.

CHEYENNE COUNTY:
—On May 15 a Black-throated Blue Warbler and a Hooded Warbler were reported on 
Cheyenne CR-CC at CR-16 creek crossing.
—On May 15 a Magnolia Warbler was reported by at Mitchek Ranch (private, view 
only from road), site of 2018 Golden-crowned Warbler stakeout.
 
CUSTER COUNTY:
—On May 17 a Baltimore Oriole was reported on Matterhorn Circle South in Rosita 
SW of Westcliffe by Kathleen Boulle.
 
DENVER COUNTY:
—On May 17 a Black-throated Gray Warbler was reported at Heron Pond Natural 
Area by Jake Shorty.
—On May 17 a Blackburnian Warbler was re-found at First Creek at Green Valley 
Ranch and seen by numerous birders. First reported May 14 by Joe Chen. A 
Blackburnian also was reported May 13 on Sanderson Gulch Trail near Ruby Hill 
Park.
—On May 16 a Magnolia Warbler was reported at Bluff Lake Nature Center by 
Michael Dougherty and seen by numerous birders.
  
DOUGLAS COUNTY:
—On May 14 a Field Sparrow was reported on North Rampart Range Road by Janet 
Peters.

ELBERT COUNTY:
—On May 15 a Magnolia Warbler was reported at a roadside oxbow west of Agate by 
Nathan Pieplow.
 
EL PASO COUNTY:
—On May 17 a Magnolia Warbler was reported at Fields Park, Manitou Springs by 
Tyler Stewart.
—On May 16 a Scarlett Tanager was reported northeast of Old Colorado City in 
Fort Collins by Michael Rogers.
—On May 16 a Golden-winged Warbler was reported at Clear Spring Ranch. First 
reported May 13 by Alan Ketcham.
—On May 16 a Blue-winged Warbler was reported at Clear Spring Ranch. First 
reported May 10 by Tyler Stewart.
*Note: Chico Basin Ranch is closed to the public, except to dues-paying members 
of the birding, hunting and fishing clubs. Posts about birds seen there are 
being omitted from this report at the ranch’s request.
 
FREMONT COUNTY:
—On My 18 a Blue-winged Warbler was reported on the Cañon City Riverwalk (Sell 
Lake to Raynolds Ave) by Jerry DeBoer.
—On May 16 a MEXICAN WHIP-POOR-WILL was re-heard off Oak Creek Grade Road south 
of Cañon City (Road 143) in Pike-San Isabel NFs. (Coordinates: 
38.3296,-105.2398). First heard May 6 by Jerry DeBoer. Because of high interest 
in this bird, PLEASE no playing of birdsong recordings.
  
JACKSON COUNTY:
—On May 16 a Winter Wren was reported at State Forest SP by Edward Raynor.

JEFFERSON COUNTY:
—On May 17 a Scissor-tailed Flycatcher was reported at Conifer Community Park 
at Beaver Ranch.  
—On May 17 an ANNA’S HUMMINGBIRD was reported at Soda Creek Pond by JoAnn 
Hackos.
—On May 17 a Pine Warbler was reported at Tucker Gulch, Golden. First reported 
May 13 by Barbara Baring.
—On May 17 a Black-throated Gray Warbler was reported at Tucker Gulch. First 
reported May 13.
—On May 16 a LOUISIANA WATERTHRUSH was reported at Chatfield SP (upstream of 
Kingfisher Bridge) by Matt Rodgers.
—On May 16 a Golden-winged Warbler was re-found at Tucker Gulch, Golden. First 
reported May 7 by Terrance Wells.
—On May 15 a Mourning Warbler was reported on the Clear Creek Trail (Golden to 
I-70) by James McCall and Mark Chavez.
—On May 15 two Baltimore Orioles were reported  at Harriman Lake Park, 
Littleton by Jill Orsatti.
*Note:  Red Rocks Park is closed indefinitely because of the Covid-19 outbreak.
  
LARIMER COUNTY:
—On May 18 an Eastern Meadowlark (Lilian’s) was reported at Bud Mielke 
Reservoir SW of Loveland. First reported May 16 by Joe Kipper. Because this 
singing bird is likely trying to breed here, PLEASE no playing of birdsong 
recordings.
—On May 18 a Blackburnian Warbler was reported in Ft Collins at CSU 
Environmental Learning Center, near the SE corner of Spur Trail, by Adrian 
Lakin.
—On May 17 a Golden-winged Warbler was reported at Watson Lake, Belluve. First 
Seen May 14.
—On May 16 a McCown’s Longspur was reported at Soapstone Prairie NA by Jay 
Breidt.
—On May 16 a Blackburnian Warbler was reported at Prospect Ponds NA near Fort 
Collins by Bryan Tarbox. On May 15 a female Blackburnian Warbler was reported 
at Watson Lake, Bellvue. First seen May 14.
—On May 16 a Field Sparrow was reported at Watson Lake, Bellvue and southeast 
of Hamilton Reservoir north of Wellington. On May 15 a Field Sparrow was 
reported at Lake Estes, Estes Park. First reported May 14 by Marc Hemmes.
—On May 16 a Magnolia Warbler was reported at CSU Environmental Learning 
Center, Fort Collins by Brad Biggerstaff and seen by several others.
—On May 16 a Mourning Warbler was reported at Watson Lake, Bellvue by Robert 
Beauchamp.
—On May 15 a Philadelphia Vireo was reported at Prospect Ponds Natural Area, 
Fort Collins by Jim Nachel.
 
LINCOLN COUNTY:
—On May 16 a Wood Thrush was reported at Thompson Ranch (private) 15 miles NE 
of Limon by by Glenn Walbek.
  
MESA COUNTY:
—On May 15 a Least Tern was reported at James M Robb Colorado River SP, Pear 
Park. First reported May 14 by Carol Ortenzio. A Least Tern also was reported 
May 11 on the Colorado River Trail in Grand Junction.
 
PITKIN COUNTY:
—On May 16 two Black-throated Gray Warblers were reported on Red Canyon Trail 
(off Lower River Road NW of Woody Creek() by Bryan Gieszl. Also on May 16, six 
Black-throated Gray Warblers were reported on Red Rim Road.
  
PUEBLO COUNTY:
—On May 17 a BLACK VULTURE was reported flying over Hwy 50, immediately south 
of Pueblo Airport by Chris Selvig.
—On May 14 a Yellow-throated warbler was re-found at Roselawn Cemetery, Pueblo. 
First reported May 7 by Evan Carlson.
*Note: Chico Basin Ranch is closed to the public, except to dues-paying members 
of the birding, hunting and fishing clubs. Posts about birds seen there are 
being omitted from this report at the ranch’s request.
 
RIO GRANDE COUNTY:
—On May 18 a BLACK PHOEBE was reported at Home Lake SWA by John Rawinski.  
—On May 18 a May 17 sighting of a Blackpoll Warbler was reported at Home Lake 
SWA by John Rawinski.  The bird was found by Lance Cheslock and Rachael Couoh.
—On May 17 a Scarlet Tanager was reported at Home Lake SWA.  First reported by 
John Rawinski on May 7.  Other birds seen include Black Phoebe, Lincoln’s 
Sparrow and Western Tanagers. 

WELD COUNTY:
—On May 16 a Sedge Wren was reported at Front Range Land & Livestock (SE of 
Milliken) by Zach Schiff.
*Note: Crow Valley Campground is closed to all human activity until at least 
May 31 (per USFS district office).
 
YUMA COUNTY:
—On May 17 a White-throated Sparrow was reported at Stalker Lake SWA by Joey 
Kellner.
—On May 16 a Mourning Warbler was reported at Hale Ponds by David Dowell, and 3 
Mourning Warblers were reported at Hale Crossroads and the Wray Fish Hatchery 
by Ryan and Jack Bushong.
 
____________________________________
 
PLEASE NOTE: Because of the Covid-19 pandemic, Denver Field Ornithologists and 
other CO birding clubs have suspended all field trips scheduled for May and 
June, including the annual Colorado Field Ornithologists convention in Pueblo 
(reset for May 2021).
 
Please share interesting and/or unusual birds and behavior observations on 
COBirds.  
 
Happy Birding and please stay safe,
Allison Hilf 
Aurora, CO
(303) 888-5110

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