Date: 12/5/17 3:11 am
From: Amy Davenport <cobussec...> [cobirders] <cobirders-noreply...>
Subject: [cobirders] Colorado Rare Bird Alert for December 5, 2017
Hello cobirders

Our report is called Rare Bird Alert because search engines find it
better. The report is really "Uncommon Bird Report" Not all uncommon
birds are rare birds. Birders may want to know where to see them anyway!
Without being a member, "cobirders" can be read at:

Report Uncommon Birds at: 303-324-7994 or

NOTE: Reports do not confirm sightings. Choose to chase at your own risk
and expense.!
NOTE: To reduce length of report, only recent sightings listed; visit
Colorado Birding Society's website everyday for additional sightings!

Reports added: 12/4/2017
Adams (Harris's Sparrow, American Dipper)
Arapahoe (Greater Scaup)
Boulder (Barrow's Goldeneye, Chestnut-sided Warbler)
Delta (Great Egret)
El Paso (Greater White-fronted Goose)
Garfield (Barrow's Goldeneye)
Jefferson (Empidonax Flycatcher)
Larimer (Black-and-white Warbler, Bonaparte's Gull, Lesser Black-backed
Mesa (Summer Tanager)
San Miguel (Barrow's Goldeneye)


Adams County
++++First Creek Trail
Harris's Sparrow (John Breitsch/Richard Stevens) (first 11/29) last 12/4
(With flock of American Tree Sparrows 1/4 to 1/2 mile west of Buckley
++++Lowell Ponds Wildlife Area
American Dipper (Bob Canter) first 12/4
(east of Lowell Blvd/below I76 bridges)
++++South Platte Birding Area
Swamp Sparrow (Frankie Toan) first 12/3
Barrow's Goldeneye --south/88th avenue (Dale Pate/John Breitsch:Christine
Alexander) (first 11/20) 2; last 12/2
++++Rocky Mountain Arsenal
Common Loon --Lake Ladora (Candice Johnson/Cynthia Kristensen) (first
10/31) last 12/2

Arapahoe County
++++South Platte Park
Greater Scaup (2) --C470 area (Christopher Warneke/Washburn:Thompson)
(first 11/24) 5; last 12/4
++++Cherry Creek Reservoir
Greater White-fronted Goose (Gabriel Wiltse) last 12/3
Iceland Gull (Gabriel Wiltse) last 12/3
++++Chapel Hill Memorial Gardens
Harris's Sparrow (Jared Del Rosso) first 12/3
++++Blackmer Lake area/Highline Canal Trail
Hermit Thrush (Jared Del Rosso) first 12/2
Gray Catbird (Jared Del Rosso) first 12/2
++++Aurora Reservoir
Black Scoter (Michaels/Stevens) (first 11/22) last 12/1
Mew Gull --Senac Cove (Richard Stevens) first 12/1
Lesser Black-backed Gull --shore at mile 2.5 (Dave King/Stevens) (first
11/5) last 12/1

Boulder County
++++Greenlee Preserve/Waneka Lake
Barrow's Goldeneye (Randall Siebert) first 12/4
++++Longmont (location unknown)
Chestnut-sided Warbler (Gaynor Nelson) first 12/4
++++Boulder Creek at 75th Street
Swamp Sparrow --Boulder Creek/75th Street (Steve Frye/Christine
Alexander) (first 12/2) last 12/3
European Goldfinch --Boulder Creek/75th Street (Steve Frye/Willem van
Vliet) (first 12/2) last 12/3
Greater Scaup (2) (Ron Podhajsky) first 12/2
++++Twin Lakes Open Space
Hammond's Flycatcher (Jeff Parks/Peter Gent) (first 11/19) last 12/2
++++Walden Ponds
Greater Scaup (2) (Ron Podhajsky) first 12/2
Swamp Sparrow --Boulder Creek/75th Street (Steve Frye) first 12/2

Broomfield County
++++Plaster Reservoir
Common Yellowthroat (Matt Hofedtz) (first 11/11) last 12/3

Denver County
++++Denver City Park
Common Redpoll (John Breitsch) first 12/3
(near retention pond, southeast of Ferril Lake)

Douglas County
++++Salisbury Equestrian Park
Brant --same bird as Twenty mile Pond (Rebecca Laroche) last 12/3
Greater Scaup (2) (Nancy Davis/Cynthia Kristensen) (first 11/20) 1; last
++++Twenty-mile Pond at Bar CCC Park
Brant (Cheri Phillips/Tom Wilberding) (first 11/11) last 11/29
(also check field at northwest corner of Plaza Drive & 20-Mile road; 0.7
miles north of pond)

El Paso County
++++Prospect Lake at Memorial Park, Colorado Springs
Greater White-fronted Goose (Steve Getty/Kevin Ash) (first 11/25) last

Jefferson County
++++Harriman Lake Park
Empidonax Flycatcher --first willows along path from parking lot (David
Suddjian) first 12/4
++++Tucker Lake
Lesser Black-backed Gull (Aaron Shipe) first 12/2

Jefferson/Douglas Counties
++++Chatfield Reservoir area
Common Loon --downstream/Kingfisher Bridge (Sue Riffe) first 12/2

Larimer County
++++CSU Environmental Learning Center to Cattail Chorus
Black-and-white Warbler --near parking lot (Damion Strommer/Lori Zabel)
(first 11/25) last 12/4
++++Horseshoe Lake
Bonaparte's Gull (1) (Michael Britten) last 12/4
Lesser Black-backed Gull (8) (Michael Britten) last 12/4
++++Welch Reservoir
Red-necked Grebe (Nick Komar:Walter Wehtje) first 12/3
Bonaparte's Gull (45) (Komar:Wehtje) first 12/3
++++Lonetree Reservoir Wildlife Area
Winter Wren (Komar:Wehtje) first 12/3
Bonaparte's Gull (10) (Nick Komar) first 12/2
++++Boyd Lake State Park
Iceland Gull (David Wade) last 12/3
Lesser Black-backed Gull (11) (Wade) last 12/3
Glaucous-winged Gull (1st cycle) (David Dowell/Komar) (first 11/21) again
++++Lower Hoffman Lake
Bonaparte's Gull (4) (Nick Komar) first 12/3
++++Lory State Park
American Three-toed Woodpecker (Lori Zabel) last 12/3
++++Grandview Cemetery
Eastern Screech-Owl (Aaron Yappert) last 12/3
++++Larimer County Landfill
Iceland Gull (Nick Komar) last 12/2
Lesser Black-backed Gull (Komar) last 12/2
(Restricted access, see directions; closed on Sundays, no view from
outside of property)
++++Lake Loveland
Lesser Black-backed Gull (Komar) 1; last 12/2
Iceland Gull (Michael Britten) (first 11/27) last 12/1
++++Loveland Reservoir
Bonaparte's Gull (Nick Komar) (first 11/15) last 12/2
++++Equalizer Lake
Greater White-fronted Goose (Robert Beauchamp/Nick Komar) (first 11/22)
last 12/2
++++Rocky Mountain National Park
American Three-toed Woodpecker (1) --Bear Lake (Fawn Simonds) last 12/2

Pueblo County
++++Pueblo City Park
Carolina Wren (Percival/David Tonnessen) (first 11/15) last 12/3
Chestnut-sided Warbler (Paul Hurtado/Tonnessen) (first 11/25) last 12/3
(All unless otherwise stated: Arkansas River Trail--east of Pueblo Blvd)
++++Pueblo Reservoir
Great Black-backed Gull (adult) (Percival/Alan Ketcham) (first 11/7) last
Lesser Black-backed Gull (Kevin Ash) last 12/2
++++Red Creek Springs Road West
Curve-billed Thrasher (Mark Oreskovich) first 12/3

Weld County
++++County Road 136
Gray-crowned Rosy Finch (16) --east of CR 105 (Kathy Mihm-Dunning) first
++++County Road 111 (btw CR 124-136)
Sharp-tailed Grouse (5) (Gene Rutherford) last 12/3
Snow Bunting (Pheneger) first 12/2
Sharp-tailed Grouse(Re-introduced Birds, Plains subspecies)
(2) --CR 107/btw CR 112/CR 118 (Gene Rutherford) last 12/3
++++Black Hollow Reservoir
Iceland Gull (2) (Mlodinow/Rutherford) (first 11/28) last 12/3
Lesser Black-backed Gull (3) (Mlodinow/Rutherford) first 12/3
Great Black-backed Gull (Mlodinow/Rutherford) (first 11/28) last 12/3
++++Windsor Lake
Greater White-fronted Goose (3) (Mlodinow/Gene Rutherford) (first 12/2)
1; last 12/3
++++Adams and Bunker Reservoirs
Snow Bunting (3) (Steve Mlodinow/Pheneger) (first 11/28) last 12/2
Greater White-fronted Goose (Steve Mlodinow/Sue Riffe) (first 11/28) last
++++Frank Wildlife Area & Gravel Ponds
Greater Scaup --gravel ponds (Mlodinow) first 12/2
Rusty Blackbird --Wildlife Area (Mlodinow) first 12/2
++++Union Reservoir & area
Pacific Loon (Steve Mlodinow/John Rutenbeck) (first 11/9) last 12/2
Bonaparte's Gull (3) (Mlodinow:Pheneger/Rutenbeck) (first 10/17) 28; last
++++Windsor Reservoir
Iceland Gull (Mlodinow) first 12/2
Lesser Black-backed Gull (Gene Rutherford/Mlodinow) (first 11/11) 3; last
++++St. Vrain State Park
Greater White-fronted Goose (5) (Bill Schmoker) first 12/2
++++Greeley Gravel Ponds at 35th Avenue
Greater White-fronted Goose (Gary Lefko/Gene Rutherford) (first 11/27)
last 12/2
Eastern Screech-Owl (Mlodinow) first 12/2
Fox Sparrow (red) (Gene Rutherford) reported 12/2


Baca County
++++Two Buttes Reservoir & area
Winter Wren (4) (David Dowell:Tim Smart/Mark Chavez) (first 11/26) 3;
last 12/3


Logan County
++++Red Lion Wildlife Area
Eastern Bluebird (5) --Little Jumbo Reservoir (Kathy Mihm-Dunning) first

Morgan County
++++Jackson Reservoir & area
Long-eared Owl (Stevens:Michaels) 1; last 11/29
Swamp Sparrow (Stevens:Michaels) first 11/28
White-throated Sparrow (2) (Mlodinow/Stevens:Michaels) (first 9/30) last
Eastern Screech-Owl (Stevens:Michaels) last 11/28


Chaffee County
++++Sands Lake Wildlife Area
Barrow's Goldeneye (2) (Jack Harlan/Jeff Guy) (first 11/17) 12/1
++++Ice Lake
Pinyon Jay (up to 280) --Private property, view from road (Hagenlocher)
1; last 12/1

Clear Creek County
++++Guanella Pass
White-tailed Ptarmigan (Stevens:Ken Bowen) 6; last 12/1
American Three-toed Woodpecker --Campgrounds (Stevens:Ken Bowen) 1; last

Delta County
++++G50 Road
Great Egret --G50 & CR 1250 (Glenn Pearson/Andrea Robinsong) first (first
11/10) last 12/4

Garfield County
++++Devereux Road & Marijuana Shop
Barrow's Goldeneye (2+) (JoAnn Riggle Potter) first 12/4
++++Rifle Gap Reservoir
Barrow's Goldeneye (JoAnn Riggle) first 12/4
++++Dotsero Ponds
Pinyon Jay (45) (JoAnn Riggle) last 12/3

Grand County
++++Shadow Mountain Reservoir
White-winged Scoter (Joey Angstman/Paul Slingsby) (first 11/21) last 12/1
Barrow's Goldeneye (7) (Slingsby & all) first 12/1
++++Lake Granby
Barrow's Goldeneye (6) (Slingsby & all) first 12/1

Mesa County
++++Grand Junction Yard
Summer Tanager (female) --email for update: <jcmoffatt_5...> (Connee
Moffatt/Carol Ortenzio) (first 12/2) last 12/4
(email for update and to see: <jcmoffatt_5...>)
++++James Robb Colorado River State Park
White-winged Scoter (Denise & Mark Vollmar/Carol Ortenzio) (first 11/11)
last 12/3

Montezuma County
++++Narraguinnep Reservoir
White-winged Scoter (Erik Hendrickson/Jim Beatty) (first 11/11) again

Park County
++++Eleven Mile Reservoir
Gray-crowned Rosy Finch (125) (Jack & Ryan Bushong/Richard Bunn) (first
11/25) last 12/1
Black Rosy Finch (2) (Richard Bunn) first 12/1

Pitkin County
++++Ruedi Reservoir
Barrow's Goldeneye (male) (Filby/Vic Zerbi) (first 10/31) 2; last 12/1
Barrow's Goldeneye (3) --Farm Pond on road to Reservoir (Lousie
Glaser/Zerbi) (first 11/11) 23; last 12/1

San Miguel County
++++Miramonte Reservoir
Barrow's Goldeneye (2) (Hynes & all/George Steele) (first 11/18) last

Summit County
++++Dillon Reservoir
Long-tailed Duck (adult female) (Doug Ward) first 12/2
(Snake River Inlet trailhead; Hwy 6 & Swan Mt Road)

Good Birding!

Directions to birding spots and maps on CoBus website:

Amy Davenport, Secretary, Colorado Birding Society Denver, CO
Contact CoBus/Report Interesting Birds: 303-324-7994
Subscribe to "cobirders" by sending blank email to:
cobirders-subscribe AT
Read "cobirders" at: Rare Bird


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