Date: 12/20/17 3:41 am
From: Amy Davenport <cobussec...> [cobirders] <cobirders-noreply...>
Subject: [cobirders] Colorado Rare Bird Alert for December 20, 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: 12/19/2017
Adams (Trumpeter Swan)
Arapahoe (Harris's Sparrow)
Baca (Mississippi Kite, Western Screech-Owl, Northern Saw-whet Owl, Barn
Owl, Short-eared Owl, Long-eared Owl, Winter Wren, Juniper Titmouse, Pine
Warbler, Rufous-crowned Sparrow, Common Redpoll, Northern Cardinal,
Curve-billed Thrasher)
Boulder (Red-necked Grebe)
Denver (Pacific Loon, Common Loon)
Delta (Fox Sparrow)
Fremont (Western Screech-Owl)
Jefferson (Yellow-throated Warbler, Prairie Warbler, Swamp Sparrow)
Larimer (Harris's Hawk, Palm Warbler, Swamp Sparrow, Iceland Gull, Lesser
Black-backed Gull, Glaucous Gull)
Montrose (Pinyon Jay)
Ouray (Surf Scoter, Common Loon)
Pueblo (Prairie Warbler, Greater Scaup, Barrow's Goldeneye)
Weld (Long-tailed Duck, Bonaparte's Gull, Great Egret)


Adams County
++++Rocky Mountain Arsenal
Trumpeter Swan --Lower Derby Lake (Synder/Tim Mitzen) (first 12/9) last
++++South Platte Birding Area
Barrow's Goldeneye --south/88th avenue (Dale Pate/Eric DeFonso) (first
11/20) last 12/17

Arapahoe County
++++Chapel Hill Memorial Gardens
Harris's Sparrow --hedgerow/western edge (Jared Del Rosso) (first 12/3)
last 12/19
++++Aurora Reservoir
Greater White-fronted Goose (Meg Reck) last 12/18
Long-tailed Duck (2 female, 1 male) (Richard Stevens/Dave King) (first
12/13) 2; last 12/18
White-winged Scoter (male, female) (Richard Stevens/Dave King) (first
12/13) 2; last 12/18
Lesser Black-backed Gull (Washburn:Thompson) last 12/17
Greater Scaup (2) (Richard Stevens/Washburn:Thompson) (first 12/13) 1;
last 12/17
++++Cherry Creek Reservoir
Pacific Loon (Bob Righter/Dave King) (first 12/13) last 12/17
Common Loon (Diane Roberts/Dave King) (first 12/7) last 12/17
Iceland Gull (Dave King) last 12/17

Boulder County
++++Valmont Reservoir Complex
Red-necked Grebe (2) (Michael Lamson/Matt Hofeditz) (first 12/16) last
Greater Scaup (John Vanderpoel:Bill Kaempfer/Randall Siebert) (first
12/17) last 12/18
Pacific Loon (Bill Kaempfer/Peter Burke) (first 12/10) last 12/18
Common Loon (Kaempfer/Peter Burke) (first 12/10) last 12/18
++++Golden Ponds
Swamp Sparrow (3) (Luke Pheneger) (first 12/16) 2; last 12/18
++++White Rocks Trail
Stub-tailed Wren (probable Winter) (Christian Nunes) first 12/17
Common Yellowthroat (Nunes) first 12/17
Swamp Sparrow (Nunes) first 12/17
++++Fentress Lake
Common Redpoll (2) (Charles Hundertmark) first 12/17
++++Twin Lakes Open Space
Hammond's Flycatcher (Jeff Parks/Bill Schmoker) (first 11/19) last 12/17
++++Boulder Reservoir
Pacific Loon (Joyce Takamine) first 12/17
++++North 83rd Road, Longmont
Eastern Phoebe --see map (Paul Ode) reported 12/16

Broomfield County
++++Baseline Road & Huron Street, Broomfield
Burrowing Owl --southwest corner (Ivan Mota) (first 12/15) last 12/18

Denver County
++++Marston Reservoir
Pacific Loon (Alex Hopping/Eric DeFonso) (first 12/16) last 12/19
Common Loon (Alex Hopping/DeFonso) (first 12/16) last 12/19

El Paso County
++++Red Rock Canyon Open Space
Harris's Sparrow (Jim Merritt) (first 12/10) last 12/18

Jefferson County
++++Belmar Place apartment (southwest of pond)
Yellow-throated Warbler (Bill Eley/Bob Shade) (first 12/16) last 12/19
Prairie Warbler (Frank Farrell/Bob Shade) (first 12/16) last 12/19
++++Wheat Ridge Greenbelt
Swamp Sparrow (Tom Wilberding) first 12/19

Larimer County
++++Running Deer Natural Area
Harris's Hawk --north & south of Colorado Visitor's Center (David
Wade/Georgia Doyle) (first 12/10) last 12/19
++++Cache La Poudre Drive
Palm Warbler --2270 (Georgia Doyle/Leatherman) (first 12/16) last 12/19
(latest: 20 feet south of Russian Olive trees)
++++Riverbend Ponds Natural Area & Poudre River Trail
Swamp Sparrow (Nick Komar) first 12/19
++++Larimer County Landfill
Iceland Gull (Nick Komar) 2; last 12/19
Lesser Black-backed Gull (Komar) 15; last 12/19
Glaucous Gull (Komar:Wehtje) first 12/19
++++Horsetooth Reservoir
Iceland Gull (4) (Nick Komar/David Wade) (first 12/17) last 12/19
Lesser Black-backed Gull (5) (Wade) first 12/19
Glaucous Gull (Komar/Wade) (first 12/17) last 12/19
(All above seen from CR 38E, southeast corner of Reservoir;
++++College Lake
Lesser Black-backed Gull (Nick Komar) first 12/18
++++Rawhide Reservoir
Trumpeter Swan (3 adult) (Walter Wehtje:Nick Komar/Komar) (first 12/9)
last 12/17
++++Lions Open Space
Stub-tailed Wren (probable: Winter Wren) (Austin Hess:Gwen Moore/Todd
Deininger) (first 12/16) last 12/17
++++Lory State Park
Common Loon (2) (Caroline Olson) first 12/17
Lesser Black-backed Gull (Caroline Olson) first 12/17

Pueblo County
++++Pueblo Reservoir
Prairie Warbler --below dam (Leon Bright/Percival) (first 12/5) last 12/19
Iceland Gull --south marina (Doug Kibbe/Laroche:Roberts) (first 12/16)
last 12/18
Lesser Black-backed Gull (Laroche:Roberts) last 12/18
Great Black-backed Gull (adult) (Percival/Laroche:Roberts) (first 11/7)
last 12/18
Common Loon (Doug Kibbe) 2; last 12/16
Bonaparte's Gull (2) (Percival/Van Truan) (first 10/24) 120; last 12/16
Common Redpoll --Swallows area (Van Truan) first 12/16
++++Pueblo City Park
Greater Scaup (1) --Goodnight trail (Joel & Dale Adams/Richard Bunn)
(first 12/10) last 12/19
Barrow's Goldeneye (2) --Goodnight Trail (Jane Stulp/Richard Bunn) (first
12/9) 3; last 12/19
Carolina Wren (Percival/Drummond) (first 11/15) last 12/16
(All unless otherwise stated: Arkansas River Trail--east of Pueblo Blvd)
++++Roselawn Cemetery
Yellow-bellied Sapsucker (Gregg Goodrich) first 12/18
++++Valco Ponds
Greater Scaup (2) (Rebecca Laroche:Diane Roberts) first 12/18
Long-tailed Duck (2) (Laroche:Roberts) first 12/18
White-throated Sparrow (Laroche:Roberts) first 12/18

Weld County
++++Windsor Lake
Long-tailed Duck (Gary Lefko/Alison Huxon:Mlodinow) (first 12/11) last
Barrow's Goldeneye (Josh Bruening) (first 12/11) last 12/18
Glaucous Gull (Bruening) first 12/18
Lesser Black-backed Gull (5) (Mlodinow/Bruening) (first 12/12) 1; last
++++Union Reservoir
Bonaparte's Gull (3) (Mlodinow:Pheneger/Mlodinow) (first 10/17) 27; last
++++Greeley Gravel Ponds at 35th Avenue
Great Egret (late) (Shawn Mason) first 12/19
++++Woods Lake
Lesser Black-backed Gull (Mlodinow) first 12/17
++++Topminnow Natural Area
Lesser Black-backed Gull (Robert Beauchamp) first 12/17
Mew Gull (Mlodinow) first 12/17
Iceland Gull (Mlodinow) first 12/17


Baca County
++++Cottonwood Canyon (15th annual Christmas Count)
Mississippi Kite (very late, not without precedent: 12/31/1993) (CoBus
group) first 12/19
Western Screech-Owl (CoBus group) 4; last 12/19
Northern Saw-whet Owl (CoBus group) 3; last 12/19
Barn Owl (CoBus group) last 12/19
Short-eared Owl (2) (CoBus group) last 12/19
Long-eared Owl (CoBus group) last 12/19
Winter Wren (CoBus group) last 12/19
Juniper Titmouse (2) (CoBus group) first 12/19
Pine Warbler (CoBus group) first 12/19
Rufous-crowned Sparrow (CoBus group) 8; last 12/19
Common Redpoll (Mlodinow/CoBus group) (first 12/15) last 12/19
Northern Cardinal (CoBus group) last 12/19
(all above: Cottonwood Canyon)
Western Screech-Owl (CoBus group) 1; last 12/19
Northern Saw-whet Owl (CoBus group) 1; last 12/19
Winter Wren (CoBus group) last 12/19
Curve-billed Thrasher (CoBus group) last 12/19
(above: Carrizo picnic area)

Otero County
++++South of La Junta
Snowy Owl --CR 803/east/CR 25 (Kim Score/Leatherman:Thompson) (first
12/17) last 12/18
Snowy Owl --CR 15/south/CR N (Robin Bay) first 12/16
Lewis's Woodpecker --CR 25 &amp; CR Z (Robin Bay) first 12/17
++++Lake Holbrook
White-winged Scoter (Sue Riffe:Gwen Moore/Leatherman) (first 12/15) last


Logan County
++++Sterling Reservoir and Area
Common Redpoll (30) (Bill Kaempfer/CoBus group) (first 12/14) 1; last
Greater White-fronted Goose (Leon Moore/CoBus group) (first 12/14) last
Bonaparte's Gull (CoBus group) last 12/15
Harris's Sparrow (CoBus group) first 12/15
++++Overland Park Map
Common Redpoll (2) (CoBus group) first 12/15
++++Bravo Wildlife Area
Red-bellied Woodpecker (CoBus Group) first 12/15
Eastern Bluebird (2) (CoBus group) first 12/15
Eastern Screech-Owl (CoBus group) first 12/15
++++Knudson Wildlife Area
Red-bellied Woodpecker (CoBus group) first 12/15
++++Pioneer Park
Eastern Screech-Owl (CoBus group) last 12/15
++++County Road 370
Eastern Screech-Owl (2) (Doug Kibbe) first 12/14
++++Tamarack Ranch Wildlife Area
Red-bellied Woodpecker (6) (CoBus group) last 12/14
Northern Cardinal (2) (CoBus group) last 12/14
Eastern Screech-Owl (2) (CoBus group) last 12/14
Eastern Bluebird (2) (CoBus group) last 12/14
Field Sparrow (2) (CoBus group) last 12/14
Harris's Sparrow (CoBus group) first 12/14
White-throated Sparrow (1) (CoBus group) first 12/14
Common Redpoll (4) (CoBus group) first 12/14
Greater Prairie-Chicken --southern section (CoBus group) first 12/14
++++Red Lion Wildlife Area
Greater White-fronted Goose --Little Jumbo Reservoir (CoBus group) last
Long-eared Owl (2) (CoBus group) last 12/14
Harris's Sparrow (CoBus group) first 12/14

Logan/Sedgwick County
++++Jumbo Reservoir
Greater White-fronted Goose (2) (CoBus group) last 12/14
Black-legged Kittiwake (juvenile) --by outlet (CoBus group) last 12/14
Hermit Thrush --west/CR 95 (CoBus group) first 12/14
Eastern Screech-Owl (CoBus group) last 12/14
Short-eared Owl (CoBus group) last 12/14

Morgan County
++++North of Fort Morgan
Snowy Owl
(latest: CR Y, west of CR 27) Jesse Casias 12/17 NOT 12/19
(CR W, west of CR 16 (Bill Kaempfer:Mark Amershek) first 12/15
Greater White-fronted Goose (4) --Snowy Owl spot (Christine Alexander)
first 12/17
++++Fort Morgan Ponds
Stub-tailed Wren (probable Winter) (Stevens:Michaels) first 12/17
Long-eared Owl (Stevens:Michaels) first 12/17
++++Jackson Reservoir
Long-eared Owl (2) (Stevens:Michaels) last 12/16
Swamp Sparrow (Stevens:Michaels) (first 11/28) last 12/16


Delta County
++++Paonia Forest Office
Fox Sparrow (Slate-colored) (Dennis Garrison) first 12/19

Fremont County
++++Arkansas Riverwalk
Western Screech-Owl --Raynolds parking lot (Richard Bunn) last 12/19
++++Valco Ponds, Canon City
Greater White-fronted Goose (4) (Joel & Dale Adams) (first 11/12) 2; last
Red-necked Grebe (Joel & Dale Adams) first 12/17
++++Lakeside Cemetery
Williamson's Sapsucker (Richard Bunn:Jan Allbright) last 12/17
++++Chandler Road/CR 80, west of Florence
Ladder-backed Woodpecker (Bunn:Allbright) first 12/17
++++Canon City
Ladder-backed Woodpecker --N. 14th Street/Greenwood Avenue (David
Tonnessen) first 12/17
Rufous-crowned Sparrow --N. 14th Street/Greenwood Avenue (David
Tonnessen) first 12/17
++++Florence River Park
Black Phoebe (Bunn:Allbright:Drummond) last 12/17

La Plata County
++++Zink's Pond
Barrow's Goldeneye (Sue Riffe) first 12/17

Montrose County
Pinyon Jay
(53) --East 5th Avenue (Dexter:Wright) (first 9/15) 34; last 12/19
(26) --Second Park (Dexter:Wright) first 12/19
++++Old Hwy 90 along Silver Hawk Ranch
Pinyon Jay (27) (Dexter:Wright) (first 10/30) 46; last 12/17

Ouray County
++++Ridgway State Park
Surf Scoter (Betty Fenton/Aaron Yappert) (first 12/6) last 12/19
(latest: dallas creek inlet, also check dutch charlie bay)
Common Loon (Aaron Yappert) last 12/19

Park County
Gray-crowned Rosy Finches (15) (Norm Lewis) (first 11/22) 60; last 12/15
Brown-capped Rosy Finch (3) (Norm Lewis) (first 11/22) 1; last 12/15

Routt County
++++Stagecoach Recreational Area
Barrow's Goldeneye (2) (Tom Litteral) (first 11/12) 17; last 12/17

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
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