Date: 12/2/19 5:33 am
From: Amy Davenport <cobussec...> [cobirders] <cobirders-noreply...>
Subject: [cobirders] Colorado Rare Bird Alert for December 2, 2019
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: 12/1/2019
Arapahoe (Mew Gull, Yellow-billed Loon)
Arapahoe/Jefferson (Long-tailed Duck, Black Scoter, Surf Scoter)
Chaffee (Eastern Bluebird)
Jefferson (Tundra Swan)
Jefferson/Douglas (White-winged Scoter)
Pueblo (Great Black-backed Gull, Red-throated Loon)
Summit (Greater Scaup)
Weld (Long-tailed Duck, Barrow's Goldeneye, Gray-crowned Rosy Finch)


Adams County
++++Near Lowell Ponds Wildlife Area
American Dipper --downstream Lowell Blvd (Bob Canter) (first 10/20) 2;
last 11/28
(Latest: check dam at Lowell Blvd & under I76 bridges)

Arapahoe County
++++Aurora Reservoir
Mew Gull (David Dowell/Mlodinow) (first 11/5) last 12/1
Yellow-billed Loon (likely Cherry Creek Reservoir loon?) (Mlodinow) first
Lesser Black-backed Gull (2) (Stevens) (first 10/18) 1; last 11/30
Common Loon (2) (Richard Stevens/Stevens) (first 10/31) 1; last 11/30
++++Cherry Creek Reservoir
Trumpeter Swan (2) --marina & dam area (Hap & Christopher Ellis/Crystal
Wilson & all) first 11/28 again 11/30
Glaucous Gull (Stevens:Kosten/Stevens) (first 11/28) last 11/30
Bonaparte's Gull (5) (Bez Bezuidenhout/Stevens) (first 10/26) 2; last
Yellow-billed Loon (Stevens:Cole Sage/Hap & Christopher Ellis) (first
10/28) last 11/28
Possible Glaucous-winged Gull (Stevens:Kosten) first 11/28
++++Lee Gulch Trail & St. Marys Church Area
Brown Thrasher (Santiago Tabares) first 11/28
(Highline Canal--Lee Gulch to Broadway, see map)

Arapahoe/Jefferson County
++++South Platte Park Reservoir & Area
Long-tailed Duck (2) (Adam Vesely) first 12/1
Black Scoter (Jefferson Cty) (Mark Chavez:James McCall/Adam Vesely)
(first 11/13) last 12/1
Surf Scoter --Eaglewatch Lake (most likely South Platte Park Reservoir
bird) (Stevens) last 12/1
Surf Scoter (Jefferson Cty) (Mark Chavez:James McCall/Claire H) (first
11/13) last 11/30

Boulder County
++++Walden Ponds area
Mew Gull (Sue Riffe) reported 12/1

Denver County
++++First Creek Trail at 56th Avenue
Harris's Sparrow (Stevens:Kosten) first 11/28
(high weeds south Horse Corrals, northwest mobile building office, south
of 56th Avenue)

El Paso County
++++Red Rock Canyon Open Space
Gray-crowned Rosy Finch (2) (Jim Merritt) (first 11/27) last 11/28

Jefferson County
++++Harriman Lake Park
Tundra Swan (6) (Lucy Dealcins) first 12/1
++++Clear Creek Trail, Golden to I70
Swamp Sparrow --west of I70 (Bez Bezuidenhout) first 11/30

Jefferson/Douglas Counties
++++Chatfield Reservoir
White-winged Scoter (2) (M.OB./Morris:Alexander) (first 11/9) last 12/1

Larimer County
++++Lory State Park
Gray-crowned Rosy Finch (25) --up Well Gulch Trail (John Shenot) first
++++Larimer County Landfill & area
Gyrfalcon (Robert Beauchamp/John Shenot) (first 11/3) last 11/23
(All Above: seen from Trilby Road, west of Taft Hill)
(Restricted access to Landfill, see directions; closed on Sundays, no
view from outside of property)

Pueblo County
++++Pueblo Reservoir
Great Black-backed Gull --south marina (Percival/Michael Dougherty)
(first 11/8) last 12/1
Red-throated Loon --north picnic road & sailboard launch area
(Percival/Dougherty) (first 11/28) last 12/1
Red-necked Grebe (Brandon Percival:Van Truan) first 11/29
Pacific Loon (4) (David Tonnessen/M.OB.) (first 11/8) 1; last 11/29
Common Loon (9) (M.OB.) 3, last 11/29

Weld County
++++Union Reservoir
Long-tailed Duck (2) (Steve Mlodinow/Stevens:Kosten) (first 11/30) last
Barrow's Goldeneye (Mlodinow/Stevens:Kosten) (first 11/28) last 12/1
Mew Gull (2) (Mlodinow) (first 11/28) 3; last 11/30
++++Windsor Lake
Barrow's Goldeneye (male) (Josh Bruening/Mlodinow) (first 11/7) 3; last
++++County Road 105
Gray-crowned Rosy Finch (3) (Joey Kellner & all) first 12/1


Baca County
++++Picture Canyon
Greater Roadrunner --Picture Canyon entrance (Stevens) last 11/27
Northern Mockingbird --Sand Canyon (Stevens) last 11/27
Curve-billed Thrasher --North Canyon (Stevens) last 11/27
Rufous-crowned Sparrow --Picture Canyon parking lot (Stevens) last 11/27
++++Cottonwood Canyon
Western Screech-Owl (Stevens) last 11/26
Winter Wren (Stevens) first 11/26
Rufous-crowned Sparrow (2) (Stevens) last 11/26

Las Animas County
++++Lake Dorothey Wildlife Area
Northern Saw-whet Owl (Stevens) first 11/27
Juniper Titmouse (Stevens) first 11/27
Swamp Sparrow (Stevens) first 11/27


Chaffee County
++++County Road 163 Pond
Eastern Bluebird (4) (Greg Mihalik) (reported 11/30) last 12/1

Clear Creek/Summit Counties
++++Guanella Pass Road
White-tailed Ptarmigan (Stevens & all/Washburn & all) (first 11/14) 2;
last 11/15
(7 with 2: near 603 & Rosalie trails; Guanella Pass Road open until Dec 3
or too much snowfall)
++++Loveland Pass
White-tailed Ptarmigan (2) (Richard Stevens:Don Beers) first 11/3
(Latest: below western side of Summit)

Saguache County
++++Colorado College Baca Campus & area
Williamson's Sapsucker --Willow Creek (Chris Chappell) first 11/28

Summit County
++++Blue River Water Treatment Plant and Nearby Ponds
Greater Scaup (Jack Bushong) first 12/1

Teller County
++++Green Mountain Falls
Band-tailed Pigeon (11) (Richard Bunn) (first 11/4) 1; last 11/25

Good birding!

Directions to birding spots and photos on CoBus website:

Amy Davenport, Secretary, Colorado Birding Society
Denver, CO
Contact CoBus/Report Interesting Birds: 303-324-7994
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