Compiler:           Mary Driscoll 
e-mail:                RBA AT cobirds.org
Date:                  September 18, 2017
 
This is the Rare Bird Alert for Monday, September 18, 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.
 
Black Swift (Ouray)
Black-bellied Plover (Larimer)
American Golden-Plover (*Kiowa, Washington)
Semipalmated Plover (Washington)
RUDDY TURNSTONE (*Bent, *Crowley)
Dunlin (Adams)
Stilt Sandpiper (Washington)
Buff-breasted Sandpiper (Washington)
Pectoral Sandpiper (Washington)
Semipalmated Sandpiper (Washington)
Short-billed Dowitcher (Washington)
Solitary Sandpiper (El Paso)
Red Phalarope (Douglas)
Sabine’s Gull (Arapahoe, Douglas, Washington)
Lesser Black-backed Gull (Douglas, Washington)
Caspian Tern (Larimer, Washington)
Common Tern (Larimer, Washington)
Mississippi Kite (El Paso)
Lewis’s Woodpecker (Ouray)
Williamson’s Sapsucker (Summit)
Olive-sided Flycatcher (Weld)
Least Flycatcher (Weld)
Gray Flycatcher (Montrose)
Black Phoebe (Jefferson, Ouray)
Eastern Phoebe (*Boulder)
Cassin’s Kingbird (*Boulder, Weld)
TROPICAL KINGBIRD (*El Paso)
Blue-headed Vireo (Weld)
Cassin’s Vireo (Boulder)
Philadelphia Vireo (Adams)
Blue-gray Gnatcatcher (Washington)
Golden-crowned Kinglet (Adams)
Cassin’s Finch (Ouray)
Ovenbird (Weld)
Golden-winged Warbler (Ouray)
Black-and-white Warbler (Washington, Weld)
Tennessee Warbler (Weld)
Nashville Warbler (Weld)
American Redstart (Washington)
Northern Parula (Washington)
Bay-breasted Warbler (Washington)
Chestnut-sided Warbler (Washington)
Blackpoll Warbler (*Adams, Pueblo)
Black-throated Green Warbler (Pueblo)
Clay-colored Sparrow (Weld)
Brewer’s Sparrow (Adams, Arapahoe)
Lark Bunting (Summit)
PAINTED BUNTING (Adams)
Dickcissel (Weld)
 
ADAMS COUNTY:
--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.
 
ARAPAHOE COUNTY:
--On September 15 Deferme reports a Sabine's Gull at Aurora Reservoir.

BENT COUNTY: On September 17 Jack 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 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.

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

DOUGLAS COUNTY:
--On September 11 at Chatfield SP marina sandspit Frank Farrel found a Red 
Phalarope.
--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 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 Beaty reported 4 
Mississippi Kites (2 juv, 2ad) and David Tonnessen reported 2 juv Mississippi 
Kites and Solitary Sandpiper.
--On September 9 at Venetucci Rarm, David Rudin reported 4 Mississippi Kites.

LARIMER COUNTY:  
--On September 8 at Timnath Reservoir, Joe Mammoser reported 4 Caspian Terns.  
On September 9 at Timnath Reservoir, Candice Johnson reported Caspian Tern.
--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)
 
OURAY COUNTY:
--On September 8 at Ridgeway Banding Station, Linnea Rowse reported imm F 
Golden-winged Warbler.
--On September 9 at Billy Creek SWA, Jon Horn reported Black Phoebe.
--On September 9 at Box Canyon Falls Parks, Jon Horn reported 2 Black Swifts 
and 8 Cassin’s Finch.
--On September 9 in town of Ridgeway on Moffat St, Jon Horn reported Lewis’s 
Woodpecker.
 
PUEBLO COUNTY:
--On September 7 at Cottonwood Picnic Area below Pueblo Reservoir dam by the 
parking lot, Brandon Percival reported Black-throated Green warbler and 
Black-and-white Warbler.  On September 8 at Cottonwood Picnic Area below Pueblo 
Reservoir day, Brandon Percival reported Black-throated Green Warbler.  On 
September 9 at Cottonwood/Snakeskin Picnic Area of Lake Pueblo SP, Kathy Miller 
and Brandon Percival reported Black-throated Green Warbler.
--On September 7 at Cattail Crossing Pond in Pueblo, Brandon Percival reported 
Blackpoll Warbler.
 
SUMMIT COUNTY:
---On September 8 at Dillon Reservoir Frisco Lake front Trails, Nick Moore 
reported f Lark Bunting.
---On September 9 at North Tenmile Trailhead, Jack and Ryan Bushong reported m 
Williamson’s Sapsucker.
 
WASHINGTON COUNTY:
--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; Kathy Mihm Dunning et al 
reported American Golden Plover, 3 Semipalmated Plover, 10 Stilt Sandpipers, 
Buff-breasted Sandpiper, 2 Pectoral Sandpipers, 2 Semipalmated Sandpipers.  On 
September 9 at Prewitt Reservoir, Loch Kilpatrick, Art Hudak, and Mark Chavez 
reported American Golden Plover, 8 Semipalmated Plovers, 53 Stilt Sandpipers, 
Buff-breasted Sandpiper, 3 Pectoral Sandpipers, Sabine’s Gull, Lesser 
Black-backed Gull.
--On September 8 at Prewitt Inlet Canal grove, Kathy Mihm Dunning et al 
reported 2 Blue-gray Gnatcatchers, Northern Parula, Bay-breasted Warbler.  On 
September 9 at Prewitt Inlet Canal Grove, Loch Kilpatrick, Art Hudak, and Mark 
Chavez reported Black-and-white Warbler, Northern Parula, imm f Bay-breasted 
Warbler, and Chestnut-sided Warbler.
 
WELD COUNTY:
--On September 9 at Norma’s Grove, Ryan Graves reported Red-headed Woodpecker, 
Least Flycatcher, Cassin’s Kingbird, Tennessee Warbler.
--On September 8 at Crow Valley CG, Joey Kellner and Norm Erthal reported 
Tennessee Warbler and Nashville Warbler.  On September 7 at Crow ValleyCG 
Cynthia Kristensen reported Ovenbird.  On September 9 at Crow Valley CG Ryan 
Graves reported Blue-headed Vireo, Black-and-white Warbler, and Nashville 
Warbler.
--On September 7 at CR 57 S of CR 96 in trees by bridge, Gene Rutherford 
reported hatch year f Tennessee Warbler, 2 Clay-colored Sparrows.
--On September 8 at Behrens Reservoir, Gene Rutherford reported Dickcissel and 
2 Clay-colored Sparrows.
--On September 11 at Crow Valley Campground, Amershek reports an Ovenbird.
--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 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 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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