Sunday, March 17, 2019
Compiler: Burke AngstmanPhone: (303) 984-4963E-mail: RBA AT cobirds.org
This is the Colorado Rare Bird Alert for March 17 sponsored by Denver Field 
Ornithologists.
Observers have been diligent in reporting sightings and updates on CoBirds. 
Thanks!
CAPITAL LETTERS are used for very rare species, as listed by the Colorado Bird 
Records Committee.
(*) indicates new information on this species.
Rare, out of place and out of season species include:
Ross's Goose (Jefferson, Arapahoe)Trumpeter Swan (Mesa)Tundra Swan (Mesa, 
*Weld)Long-tailed Duck (Fremont, Larimer)Red-throated Loon (*Adams)Harris's 
Hawk (*Larimer)Yellow-bellied Sapsucker (Boulder, *Larimer)Northern Shrike 
(Montezuma)Varied Thrush (Boulder, *Elbert)Sage Thrasher (*Larimer)Mixed 
Rosy-Finch flock (Jefferson)Lapland Longspur (Larimer, Park)Field Sparrow (El 
Paso)Fox Sparrow (Red) (Jefferson)Rusty Blackbird (*Arapahoe)
Gull species: Several winter/early spring gulls are being seen, primarily in 
Pueblo, Larimer, Chaffee, Arapahoe and Adams Counties, e.g., Iceland 
(Thayer’s), Glaucous, Bonaparte’s, California, Ring-billed, Herring, Lesser 
Black-backed, and Great Black-backed Gull.For more information on these gulls, 
as well as other birds not on this RBA list, please check cobirds.org, scroll 
down to the very bottom “Bird Trax” and click on “sightings”. It should list 
all birds reported on e-bird, but seems to be on the fritz the past few days.
ADAMS COUNTY:—On March 16 a Red-throated Loon was reported at South Platte 
River 89th Ave Pond.  First seen on March 15 by Peter Ruprecht and Chris 
Petrizzo. See Peter Ruprecht post (with photos) on CoBirds.

ARAPAHOE COUNTY:—On March 13 (2) Ross's Geese were reported near West Coal Mine 
Ave and Platte Canyon Road by David Suddjian.—On March 16 (2) Rusty Blackbirds 
were reported at Cherry Creek SP.  First reported by Edward Donnan March 12.
BOULDER COUNTY:—On March 15 a Yellow-bellied Sapsucker was reported at Boulder 
Community Garden by Richard Trinker.
—On March 13 a Varied Thrush was reported on Bosque Ct in Boulder. First 
reported on Jan 23 by Ernest Crvich.
EL PASO COUNTY:—On March 15 the overwintering Field Sparrow continues at Red 
Rock Canyon Open Space.
ELBERT COUNTY:—On March 14 a Varied Thrush was reported in Elbert, Colorado by 
Jackie Dunn.  See Hugh Kingery post on CoBirds.

FREMONT COUNTY:—On March 15 a Long-tailed Duck was reported at Blue Heron Ponds 
on Hwy 115. First reported on March 6 by Rich Miller.
JEFFERSON COUNTY:—On March 12 a Ross's Goose was reported at Rocky Mountain 
Deaf School (RMDS) and adjacent fields by Michael Lester.—On March 15 the 
overwintering Fox Sparrow (Red) continues at Red Rock Trading Post.—There has 
been a mixed flock of Rosy Finches in Golden visiting the feeders at the home 
of Kirsten Witherell. To see them please text her at 720-372-0833. If she is 
not home you may go around the back gate. Be sure you have the correct address- 
19540 W 55th Place, Golden (inside Table Rock Community). The birds have been 
seen most days this winter, most prominent on colder days. Approx. 35 Black 
Rosy-Finches reported on Feb 6.
LARIMER COUNTY:—On March 16 a Harris's Hawk was reported near the intersecton 
of Ziegler and William Neal Parkway (gravel / cement plant) - see CoBirds 
posts.First reported on February 21 by Robert Beauchamp.
—On March 15 (2) Sage Thrashers were reported at Running Deer and Cottonwood 
Hollow Natural Areas by Carrie Olson and Andy Bankert.
—On March 15 (2) Lapland Longspurs were reported at 16932 - 17109 N County Road 
15 in Wellington by Nick Komar and David Wade—On March 16 Yellow-bellied 
Sapsuckers that have wintered at Grandview Cemetery were seen again. Both male 
and female have been reported - see CoBirds post by John Shenot.—On March 15 a 
Long-tailed Duck was reported at Fossil Creek Reservoir & Regional Open Space. 
First reported on Feb 16 by David Farmer.
MESA COUNTY:—On March 13 (2) Trumpeter Swans & (2) Tundra Swans were reported 
at Highline Lake State Park. First reported on Feb 9 by Glenn Pearson.
MONTEZUMA COUNTY:—On March 15 a Northern Shrike was reported at 28550 Road T.5 
in Dolores by Carol Bylsma.
PARK COUNTY:—On March 15 a Lapland Longspur was reported at 24 Main Street in 
Jefferson by James Mccoy.

WELD COUNTY:—On March 16 (3) Tundra Swans were reported at Cozzens Lake. First 
reported on March 12 by Steve Mlodinow and Scott Somershoe.


Upcoming DFO Field Trips...trip details on dfobirds.org
South-Central ColoradoMonday, March 185:00 AM - 7:00 PMDavid Suddjian (E-mail: 
dsuddjian AT gmail.com; 831-713 8659)
Broomfield CountyTuesday, March 197:00 AM - 1:00 PMDale Pale (E-Mail: dalelpate 
AT gmail.com; 575-706-4584)
Wray Chamber Greater Prairie-ChickenSaturday - Sunday, March 23-249:00 AM - 
5:00 PMGregg Goodrich (E-mail: GreggGoodrich AT gmail.com; 303-655-9135)
Canon CitySunday, March 246:00 AM - 5:00 PMMark Amershek (E-mail: mamershek AT 
msn.com; 303-329-8646)
Southeastern ColoradoMonday, March 254:30 AM - 7:00 PMDavid Suddjian (E-mail: 
dsuddjian AT gmail.com; 831-713-8659)
Fountain Park Regional Park (El Paso County)Sunday, March 316:00 AM - 3:00 
PMDiane Roberts (E-mail: Samantha576 AT aol.com; 720-278-9025)
Denver City Park (Denver City County)Sunday, March 317:00 AM - 11:30 AMPatrick 
O’Driscoll (E-mail: Patodrisk AT gmail.com; 303-885-6955)
Good Birding,Burke AngstmanLakewood, CO

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