Compiler:           Mary Driscoll 
e-mail:                RBA AT cobirds.org
Date:                  September 22, 2017
 
This is the Rare Bird Alert for Friday, September 22, sponsored by Denver Field 
Ornithologists and the Bird Conservancy of the Rockies.
 
Highlight species include: (* indicates new information on this species)
NOTE:  The RBA is now using the new AOU checklist and the order of families has 
changes.

TRUMPETER SWAN (Routt)
Black-bellied Plover (Larimer, Washington)
American Golden-Plover (Adams, Kiowa, Washington)
Semipalmated Plover (Washington)
Long-billed Curlew (*Douglas County)
RUDDY TURNSTONE (Bent, Crowley)
RED KNOT (Jefferson)
Dunlin (*Adams)
Stilt Sandpiper (Washington)
Buff-breasted Sandpiper (Kiowa, *Washington)
Pectoral Sandpiper (Montrose, Washington)
Semipalmated Sandpiper (Washington)
Short-billed Dowitcher (Logan, Washington)
Solitary Sandpiper (El Paso)
Red Phalarope (*Morgan)
POMARINE JAEGER (Kiowa)
LAUGHING GULL (*Kiowa)
Sabine’s Gull (Adams, Arapahoe, Douglas, *Larimer, Washington)
Lesser Black-backed Gull (Douglas, Kiowa, *Larimer, *Pueblo, Washington)
Caspian Tern (Washington)
Common Tern (Kiowa, Larimer, Washington) 
Mississippi Kite (El Paso)
RED-SHOULDERED HAWK (*Denver)
Olive-sided Flycatcher (Weld)
Gray Flycatcher (Montrose)
Black Phoebe (Jefferson)
Eastern Phoebe (Boulder)
Cassin’s Kingbird (Boulder, Kiowa)
TROPICAL KINGBIRD (El Paso)
Cassin’s Vireo (Boulder)
Philadelphia Vireo (Adams)
Blue-gray Gnatcatcher (Washington)
Golden-crowned Kinglet (Adams)
Cassin’s Finch (Ouray)
Curve-billed Thrasher (*El Paso)
Black-and-white Warbler (Boulder, Weld)
Nashville Warbler (Larimer)
Chestnut-sided Warbler (*Pueblo)
Blackpoll Warbler (Adams, Pueblo)
Palm Warbler (Boulder)
Yellow-throated Warbler (*Pueblo)
Summer Tanager (Archuleta)
Cassin’s Sparrow (*El Paso)
Brewer’s Sparrow (Adams, Arapahoe)
PAINTED BUNTING (Adams)
Yellow-eyed Junco (Clear Creek)

ADAMS COUNTY:
—On September 18 Jesse Casias reported an American Golden-Plover at Barr Lake 
SP  along the Neidrach Nature Trail & visitor center area. On September 19 the 
American Golden-Plover was seen again at Barr Lake SP  by David Dowell. On 
September 20 the American Golden-Plover was seen at Barr Lake SP.
—On September 18 Adam Vesely reported a Sabine’s Gull at the Adams County 
Fairgrounds lakes (Mann-Nyholt), north of Henderson Road. F ll dark gray hood. 
It was with about 125 Cal ad Ring-billed gulls. The Sabine’s Gull was seen 
again today at the same location by Dave King.
—On September 13 at Barr Lake SP on the Prairie Trail near the teepee, Ira 
Sanders, Dick Prickett and Tammy Sanders report a female 1st year PAINTED 
BUNTING.
--On September 13 at Barr Lake SP banding station, Meredith McBurney banded a 
Brewer's Sparrow.
--On September 13 at Barr Lake SP, Stringer and Whitten report 2 Philadelphia 
Vireo's.  1 was off the Pioneer Trail and the other 100 yds SE from the boat 
ramp towards the banding station.
--On September 15 McBurney banded a Golden-crowned Kinglet at the Barr Lake SP 
banding station.
--On September 16 the Sanders found a Dunlin at Barr Lake SP northwest of the 
banding station on an island with a Long-billed Dowitcher and 3 Pectoral 
Sandpipers.   On September 21 Scott Somershoe reports the Dunlin at Barr Lake 
SP, he was walking on the Neidrach Nature Trail & Visitor Center.
—On September 17 McBurney banded a Blackpoll Warbler at the banding station at 
Barr Lake SP.

ARAPAHOE COUNTY:
--On September 15 Deferme reports a Sabine's Gull at Aurora Reservoir.

ARCHULETA COUNTY:
—On September 19 Jean Zirnhelt reported a Summer Tanager at Navajo 
Reservoir—West Piedra.

BENT COUNTY: 
—On September 17 Jack and Ryan Bushong reported a RUDDY TURNSTONE at John 
Martin Res. on shoreline a few yards south of where the reservoir floods County 
Road JJ, making it impassable. It was associating with three Pectorals. A 
Northern Harrier flushed the bird, and it was not re-found.

BOULDER COUNTY:
—On September 18 Steven Mlodinow reported a Palm Warbler at Hall Ranch, on the 
Antelope Trail.
—On September 18 Jack Bushong reported a Black-and-White Warbler foraging in a 
Chickadee flock in the riparian along Coal Creek. The location was W of 
Community Park and E of Warembourg, along the Coal Creek Bike Path where is 
enters thick deciduous forest with cottonwoods and other hardwoods on either 
side. Last seen moving east towards the Community Park.
—On September 17 at Golden Ponds in Longmont, Pheneger reports an Eastern 
Phoebe.  At Roger’s Grove Park he reports a Cassin’s Vireo and a Cassin’s 
Kingbird.

CLEAR CREEK COUNTY:
—On September 17 Christine Stoughton Root reported Yellow-eyed Junco at St 
Mary’s Glacier Base.

CROWLEY COUNTY: 
—On September 17 Jack and Ryan Bushong reported a RUDDY TURNSTONE at the Sewage 
Ponds near Lake Meredith. Crowley County Road G, west of County Lane 20.

DENVER COUNTY:
—On September 19 around 5:30 pm Karl Stecher was driving east on Yale from 
Wadsworth, about eight blocks in,  a RED-SHOULDERED HAWK sailed and flapped at 
treetop level from right to left across the road. He searched the neighborhood 
but did not find the bird.

DOUGLAS COUNTY:
—On September 21 Anna Troth reports a Long-billed Curlew at Chatfield SP Marina 
Sandspit.
--On September 12 at Chatfield SP Plum Creek/sandspit area Suddjian reports 
Lesser Black-backed Gull and a juv Sabine's Gull.
 
EL PASO COUNTY:
—On September 21 Norm Lewis reported a Curve-billed Thrasher and Cassin’s 
Sparrow at Chico Basin Ranch (Fee).
—On September 19 David Tonnessen reported a Curve-billed Thrasher at Chico 
Basin Ranch (Fee).   
—On September 17 David Tonnessean reported a TROPICAL KINGBIRD at Chico Basin 
Ranch (fee). Photos and recording were made, he will submit to CBRC. 
--On September 9 at Fountain Creek Regional Park, Diana Beatty reported 4 
Mississippi Kites (2 juv, 2ad) and David Tonnessen reported 2 juv Mississippi 
Kites and Solitary Sandpiper. On September 18 Jacqueline Heyda reported 2 
Mississippi Kites at Adams Open Space in Fountain.
 
GUNNISON COUNTY:
—On September 18, Linda and Jerry Elling reported a Blue-gray Gnatcatcher at 
Hwy. 38 south of Gunnison.

JEFFERSON COUNTY:
—On September 20 Pablo Quezada reported a RED KNOT at Chatfield SP, it was at 
the swim beach. It was seen by multiple birders yesterday.
—On September 20 Tom Behnfield reports a Black Phoebe at Chatfield SP, at the 
swim beach.

KIOWA COUNTY:
—On September 20 Jane Stulp reports a Lesser Black-backed Gull at 
Upper/Queens/Neeskah Res.
—On September 20 Steve Mlodinow reports a Buff-breasted Sandpiper at Neenoshe 
Res., and the continuing LAUGHING GULL.  On September 21 Jane Stulp re-found 
the LAUGHING GULL at Neenoshe Res.
—On September 19 Steve Mlodinow reports POMARINE JAEGER, LAUGHING GULL,  Common 
Tern, and Cassin’s Kingbird at Neenoshe Reservoir. 

LARIMER COUNTY: 
—On Septmeber 21 Nick Komar reports a Lesser Black-backed Gull at Boyd Lake.
—On September 21 Cliff Hendrick reports a Lesser Black-backed Gull at Arapahoe 
Bend Natural Area.
—On September 21 Joe Mammoser reports a Sabine’s Gull at Rigden Res., also know 
as Strauss Cabin Lake, east of Fort Collins. It was frequenting the north and 
west sides of the res.
—On September 19 John Shenot reports the Nashville Warbler at the north end of 
Dixon Res. It was seen from the dam at the north end.
—On September 18 Brad Biggerstaff reports a Nashville Warbler at Dixon Res. in 
west Fort Collins this morning. The bird was also seen by Nick Komar and David 
Wade.  
--On September 14 Gary Lefko reports Black-bellied Plover in seasonal farm 
ponds (east one) .5 mi north of Douglas Road and North Giddings Road (south of 
Wellington)

LOGAN COUNTY:
—On September 20 Steve Larson reports a Short-billed Dowitcher at Jumbo 
Reservoir.

MONTROSE COUNTY: 
—On September 18, Coen Dexter reported a Pectoral Sandpiper at a pond at 
Montrose Co Rds 145 & 400.

MORGAN COUNTY:
—On September 21 David Dowell reports a Red Phalarope at Jackson res.

PUEBLO COUNTY:
—On September 21 Brandon Pervical reported a Lesser Black-backed Gull near the 
pool below Pueblo Res. Dam.
—On September 22 Brandon Percival reported a Chestnut-sided Warbler, and a 
Yellow-throated Warbler at Cottonwood Picnic area parking lot below Pueblo Res. 
Dam. Photos were obtained.
—On September 20 Brandon Percival reported a Blackpoll Warbler south of the 
Fish Hatchery Building, at Lake Pueblo SP. The bird was high in cottonwood 
trees along with a couple of Wilson’s Warblers.

ROUTT COUNTY:
—On September 20 Tom Hall reported an ad TRUMPETER SWAN at the inlet pond on 
the right of the turn to Stagecoach at Stagecoach Res.
 
WASHINGTON COUNTY:
—On September 19 at Prewitt Reservoir, Scott Somershoe reported the 
Buff-breasted Sandpiper was there this morning, along with Black-bellied 
Plover, Pectoral Sandpiper, Stilt Sandpipers, Sanderlings in all plumages 
except breeding. A Sabine’s Gull also flew by while he was there.  On September 
21 Matt Clark reports seeing the Buff-breasted Sandpiper at Prewitt Res.
—On September 9 at Prewitt Reservoir, Glenn Walbek reported 5 Semipalmated 
Plovers, 75 Stilt Sandpipers, 3 Sanderlings, Buff-breasted Sandpiper, 29 
Pectoral Sandpipers, 8 Semipalmated Sandpipers, Short-billed Dowitcher, Lesser 
Black-backed Gull, Common Tern, 2 Black-and-white Warblers, 3 American 
Redstarts, Northern Parula, Bay-breasted Warbler; On September 17 Kathy Mihm 
Dunning et al reported American Golden Plover, 3 Semipalmated Plover, 10 Stilt 
Sandpipers, Buff-breasted Sandpiper, 2 Pectoral Sandpipers, 2 Semipalmated 
Sandpipers.  
 
WELD COUNTY:
--On September 15 at Crow Valley Campground, Righter reports an Olive-sided 
Flycatcher. 

Denver Field Ornithologists Field Trips: 
First Creek at Denver Open Space Saturday, September 23 6:45 AM - 11:00 AM 
Patrick O'Driscoll (Email: [email protected] <mailto:[email protected]> 
Phone: 303-885-6955 (cell) Trail Difficulty: Easy Maximum Participants: 14 
Directions: From East Denver take 56th Ave east toward Pena Blvd. First Creek 
parking lot is just before Pena on your left (north). Or take I-70 east to Pena 
Blvd. Drive north to 56th Ave Exit. Turn left at the light and at the bottom of 
the off ramp, pass under the highway and turn right, almost immediately, into 
the First Creek parking lot. We'll look for migrants and locals in this 
riparian-cottonwood-prairie setting near DIA. We'll walk 1.5 miles of paved 
path along the creek upstream to Tower Road and back. We'll also cover at least 
one-half mile of the Buckley Road pedestrian-bicycle strip along the Rocky 
Mountain Arsenal NWR's east boundary. And we'll check First Creek's cottonwood 
groves, meadows, and prairie dog town for raptors. Dress for the season and 
bring water and snacks. NOTE: At present there are no restrooms at this 
location. Closest public facilities are off Tower Road (King Soopers). Register 
online or contact leader. 

Pawnee National Grasslands (Weld County) Sunday, September 24 FULL 6:00 AM - 
3:30 PM Karen Drozda & Chris Goulart (Email: [email protected] 
<mailto:[email protected]> Phone: 303-388-0891) Trail Difficulty: Moderate 
Maximum Participants: 12 Directions: Meet at Colorado Parks and Wildlife, 6060 
Broadway to carpool. Exit I-25 at 58th Ave, go west 2 blocks to Broadway, then 
north 2 blocks to parking lot on right. We will meet at the above described 
location promptly at 6 AM. We will assemble carpools and leave the DOW at 6:10 
AM. We will visit several productive sites such as Crow Valley Campground, 
Briggsdale, Murphy's Pasture and hopefully some playas with migrating 
shorebirds. This area should have migrating sparrows, longspurs, passerines and 
raptors. This is an all day trip. We will return to the DOW by 3:30 PM. Be 
prepared with food and water for an all day trip. The weather should be typical 
for autumn, but bring gear for changing weather. There is no shade so pack your 
hat. This is a great opportunity to bring your scope along. Please let the trip 
leaders know if you have 2 way radios that we could use. Register online or 
contact trip leader. 

Rocky Mountain Arsenal NWR Sunday, September 24 8:00 AM - 12:00 PM FULL Chuck 
Hundertmark (Email: [email protected] <mailto:[email protected]> 
Phone: 303-604-0531) Trail Difficulty: Easy Maximum Participants: 10 
Directions: Meet at the Arsenal Visitors Center, 6550 Gateway Rd, Commerce 
City, CO. General directions: On I-70 east, take exit 278, turn left onto 
Quebec St, turn right onto E 64th Ave, turn left onto Trenton St, continue onto 
Gateway Rd to Visitor Center. We'll look for migrants, waterfowl, raptors, and 
bison. We'll carpool because parking is limited at the lakes. Short walks on 
level trails. Good for beginning birders. Bathroom at Visitor's Center opens at 
9 AM. Register online or contact leader. 

Eastern Arapahoe and Adams Counties Tuesday, September 26 6:00 AM - 2:00 PM 
David Suddjian (Email: [email protected] <mailto:[email protected]> Phone: 
831-713-8659) Trail Difficulty: Moderate Directions: Meet near Bennet off I-70 
at the South side of the King Sooper's parking lot. Take I-70 east from Denver 
to the First Street exit and go north. Turn left on West Market Place Drive, 
then go right into the King Sooper's lot. We will travel the back roads in 
search of prairie breeders, shorebirds, and possible rare migrants. Some easy 
walking. We will carpool from the meeting place. Restrooms may be limited at 
times. Bring lunch and liquids. Register online or contact leader. 

Ken Caryl Valley Area Wednesday, September 27 6:30 AM - 11:00 AM David Suddjian 
(Email: [email protected] <mailto:[email protected]> Phone: 831-713-8659) 
Trail Difficulty: Moderate Maximum Participants: 8 Directions: Meet at the 
northern (main) parking lot for South Valley Park along South Valley Road just 
east of Valley Parkway. We will carpool to another site from there. Details: We 
will visit a few areas in search of a variety of birds at private Ken Caryl 
Ranch. Plan for up to 3-5 miles of mostly easy terrain, with some uphill, 
possible rocky trails and single track. Bring light hiking shoes, water and 
snacks. Register online or contact leader.

For more information on the field trips go to dfobirds.org.
 
The next monthly meeting of Denver Field Ornithologists will be on Monday, 
September 18 at 7:30 p.m. at Ricketson Auditorium of Denver Museum of Nature 
and Science.  Scott Rashid will give a program on Barn Owls.  
 
Good Birding,

Mary Driscoll
Unincorporated Arapahoe County


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