Date: 4/11/17 3:34 am
From: Amy Davenport <cobussec...> [cobirders] <cobirders-noreply...>
Subject: [cobirders] Colorado Rare Bird Alert for April 11, 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: With the many reports coming in daily this spring, RBA will reflect
daily sightings, not long term sightings, visit Colorado Birding Society's
website everyday!

Reports added: 4/10
Adams (Eastern Phoebe, Burrowing Owl)
Arapahoe (Winter Wren, Swamp Sparrow)
Boulder (Common Loon)
Broomfield (Greater Scaup)
Denver (Harris's Sparrow, Northern Mockingbird)
El Paso (Lewis's Woodpecker, White-throated Sparrow, Sage Thrasher)
Jefferson (Williamson's Sapsucker, Greater Scaup, Burrowing Owl, Eastern
Jefferson/Douglas (Common Loon, Eastern Phoebe)
Larimer (Lesser Black-backed Gull, Thayer's Gull)
Pueblo (Black Phoebe, Eastern Phoebe, Curve-billed Thrasher, Acorn
Weld (Bonaparte's Gull)
Crowley (Bonaparte's Gull)
Kiowa (Caspian Tern)
Kit Carson (Mountain Plover)
Chaffee (American Three-toed Woodpecker)
Clear Creek (White-tailed Ptarmigan)
Fremont (Rufous-crowned Sparrow, Black Phoebe, Lewis's Woodpecker)
Grand (Barrow's Goldeneye)
Jackson (Greater Sage-Grouse, Boreal Owl, Brown-capped Rosy Finch)
Mesa (Pinyon Jay, Black-throated Sparrow, Sagebrush Sparrow, Brewer's
Sparrow, Sage Thrasher)
Rio Blanco (Common Loon)
Routt (Sharp-tailed Grouse, Dusky Grouse, Barrow's Goldeneye, Common Loon)


Adams County
+++Rocky Mountain Arsenal
Eastern Phoebe (Bob Spencer/Terry Michaels) (first 4/2) last 4/10
Burrowing Owl (4, 2 locations) (Stevens:Kosten/Michaels) (first 3/31) 2;
last 4/10
(new wildlife drive: north of mile 5 & near Havana & 88th Avenue)
Short-eared Owl (Michael Hilchey) last 4/9
Sage Thrasher (Gregg Goodrich) last 4/8
Least Sandpiper --wildlife drive (Candice Johnson) first 4/8
++++Jim Baker Reservoir area
Greater Scaup --see map (Gabriel Wiltse) first 4/8
++++Barr Lake
Barn Owl (Kosten:Ehlmann) last 4/8
Long-eared Owl (2) (Kosten:Ehlmann) 2; last 4/8

Adams/Denver Counties
++++DIA Owl Loop
Burrowing Owl (3) --prairie dog town at W. Cargo Road & Third Creek
(Stevens/Kosten:Ehlmann) (first 3/15) last 4/8

Arapahoe County
++++Cherry Creek Reservoir
Winter Wren --Cottonwood Creek (Richard Stevens) first 4/10
Swamp Sparrow --Cottonwood Creek (Stevens) first 4/10
Eastern Bluebird (2) (Mary Keithler) first 4/9
++++Willow Spring Open Space
Sage Thrasher (Jared Del Rosso) first 4/8
++++Ketring Park and Lake
Eastern Screech-Owl (Cynthia Madsen:David Hill) last 4/7

Boulder County
++++Baseline Reservoir
Common Loon (Jeff Parks) (first 3/29) last 4/10
++++Walden Ponds
Black Phoebe --Boulder Creek/75th street (Jonathan Montgomery/Peter
Burke) (first 3/22) last 4/9
Swamp Sparrow (Art Reisman) first 4/6
++++Lagerman Reservoir
Long-billed Curlew (2) (Ted Floyd) first 4/9
Bonaparte's Gull (Luke & Tracy Pheneger) first 4/9
++++Greenlee Preserve/Waneka Lake
Eastern Meadowlark (Ted Floyd/Glenn Walbek) (first 4/7) last 4/8
(field just west of Waneka Lake, i.e., southwest of Greenlee Preserve

Broomfield County
++++Plaster Reservoir
Greater Scaup (3) (Goldthwait:Kibbe/Mark Minner-Lee) (first 3/5) last

Denver County
++++Westerly Creek Park
Harris's Sparrow --east of 2365 Beeler/south of retention area (Jason
Bidgood/Terry Michaels) (first 3/5) last 4/10
Northern Mockingbird (Max Leibowitz) first 4/10
++++Marston Reservoir
Common Loon (Doug Kibbe/Renee Casias) (first 4/5) last 4/9
++++Cheesman Park & Denver Botanic Gardens
Northern Mockingbird (Max Leibowitz) first 4/9

El Paso County
++++Cheyenne Mountain Park
Lewis's Woodpecker --southwest side parking lot (Tim Leppek) first 4/10
++++Bear Creek Regional Park
White-throated Sparrow --feeders by nature center (Steve Getty/Chris
Brobin) (first 1/4) last 4/10
++++Squirrel Creek Road Area
Sage Thrasher -- at Peyton Hwy (Mel Goff) first 4/10
Mountain Plover (2) --NE of Ellicott Hwy; see map (Hodges:Getty/Roger
Massey) (first 4/1) last 4/9
Sage Thrasher (Kyle Hawley/Tom Johnson) (first 4/3) last 4/9
Curve-billed Thrasher (Kyle Hawley/T. Johnson) (first 4/3) last 4/9
Burrowing Owl (2) --NE of Ellicott Hwy; see map (Somershoe/T. Johnson)
(first 4/7) last 4/9
++++Birdsall Road
Ladder-backed Woodpecker (Carragher/Chris Brobin) (first 3/19) last 4/8

El Paso/Pueblo Counties
++++Chico Basin Ranch (fee area)
Eastern Phoebe --HQ (John Drummond) first 4/7
Ladder-backed Woodpecker (3) --headquarters (John Drummond) last 4/7

Jefferson County
++++Genesee Mountain Park
Williamson's Sapsucker (2) (Richard Stevens/Dave King) (first 3/10) last
++++Robert A. Easton Regional Park
Greater Scaup (2+) (Dale Pate/Suddjian) (first 3/7) 23; last 4/10
Burrowing Owl (2) (Brian Johnson/Tim Ryan) (first 4/6) last 4/10
++++South Valley Park
Eastern Phoebe --see map (David Suddjian) first 4/10
++++Mt. Falcon Park
Dusky Grouse --Castle trail (Glenn Walbek) first 4/9
++++Reynolds Park
Northern Pygmy-Owl (Joe Blanda) last 4/9

Jefferson/Douglas Counties
++++Chatfield Reservoir
Common Loon (Gavin Bieber/Diane Roberts) (first 4/8) last 4/10
Eastern Phoebe --marina sand spit (Diane Roberts) first 4/10
Eastern Phoebe --upstream kingfisher bridge (Gregg Goodrich/Bez
Bezuidenhout) (first 3/25) 2; last 4/9
Common Loon (Gavin Bieber) first 4/8
Bonaparte's Gull (2) (Doug Shoffner) first 4/8

Larimer County
++++Oxbow Natural Area
Eastern Phoebe (up to 3) (David Wade/Brandon Nooner) (first 4/1) last 4/9
++++Boyd Lake State Park
Lesser Black-backed Gull (Craig Robson) first 4/10
Greater Scaup (6) (Andy Bankert) first 4/9
Long-billed Curlew (6) (Georgia Doyle) first 4/8
Bonaparte's Gull (Andy Bankert) first 4/7
++++Horseshoe Lake
Thayer's Gull (McCloy:Bankert) first 4/10
Lesser Black-backed Gull (4) (McCloy:Bankert) first 4/10
++++Lily Lake
Williamson's Sapsucker (female) (Dan O'Donnell) first 4/6

Pueblo County
++++Pueblo Reservoir
Black Phoebe --below dam (Jan Hansen & all) first 4/10
Eastern Phoebe --below dam (Jan Hansen & all) first 4/10
++++IL Road, north of Youtsey Airport
Curve-billed Thrasher (4) (Roderick/Tom Johnson) (first 4/2) last 4/10
Mountain Plover (2) (Richard Sayles) first 4/8
++++Pueblo Mountain Park
Acorn Woodpecker (Setta Moss) last 4/9
Williamson's Sapsucker (Chavez:Hudak/Somershoe) (first 3/5) last 4/7

Weld County
++++Union Reservoir
Bonaparte's Gull (3) (Mark Miller/Cheryl Teuton) (first 3/18) 3; last
++++Windsor Lake
Bonaparte's Gull (30) (Craig Robson) first 4/10
++++Weld County Road 37/CR 46 Ponds
Eurasian Wigeon --northeast pond (Luke & Tracy Pheneger/Frank Farrell)
(first 3/14) last 4/9
++++County Road 71
Mountain Plover (2) --just north of CR 82 (Matt Goldowitz) first 4/9
++++Firestone Gravel Pits
Greater White-fronted Goose (Ric Olson) last 4/9
++++Old Highway 52 Pond
Common Loon (3) (Mike Patterson) reported 4/8
++++Beebe Draw Ponds
Burrowing Owl --CR 42 (Gene Rutherford) last 4/8
++++Pawnee National Grasslands area
Chestnut-collared Longspur (2) --CR 114/east/CR 47 (Gene Rutherford)
first 4/8
Chestnut-collared Longspur (3) --Murphy's Pasture (Simon Harvey) first 4/7
Burrowing Owl --CR 33, btw CR 98/CR 100 (Gary Lefko) first 4/2
++++Loloff Reservoir
Greater Scaup (Tom & Debbie Behnfield) last 4/8
++++West of Behrens Reservoir
Short-billed Dowitcher (2) (Christine Alexander) reported 4/8
++++CR 134 btw CR 111 & CR 115
Sharp-tailed Grouse (19) (Bill Kaempfer) first 4/8
(debatable if these are countable birds)


Baca County
++++Pasture G, across from Washington Work Center
Long-billed Curlew (3) (Richard Sayles) first 4/9
Greater Roadrunner (1) (Richard Sayles) first 4/9
Ladder-backed Woodpecker --Little Washington Work Center (Sayles) first
Rufous-crowned Sparrow (2) --Little Washington Work Center (Sayles) first
Eastern Phoebe --Little Washington Work Center (Sayles) first 4/9
++++Cottonwood Canyon
Eastern Phoebe (Washburn:Simmons/O'Brien) (first 3/30) last 4/9
Rufous-crowned Sparrow (O'Brien) 3; last 4/9
Western Screech-Owl (Stevens) last 4/6
++++Hwy 385/south/CR VV
Burrowing Owl (3) (O'Brien) first 4/9
++++Gravel Road just East and North of Campo Lek
Cassin's Sparrow (1) (Stevens:Humbolt/Stevens & all) (first 3/24) last

Bent County
++++John Martin Reservoir area
Barn Owl --Lake Hasty (Michael O'Brien) first 4/8
Cassin's Sparrow --CR CC/west/CR 21 (Mike McCloy) first 4/8

Crowley County
++++Lake Meredith
Bonaparte's Gull (4) (Mike McCloy/Tom Johnson) (first 4/7) 3; last 4/10
Long-billed Curlew (Michael O'Brien) first 4/8
++++Lake Henry
Mountain Plover (Mlodinow) first 4/8
Bonaparte's Gull (Van Truan/o"Brien) (first 3/27) 7; last 4/8
Chihuahuan Raven (Mlodinow) reported 4/8

Otero County
++++County Road FF & CR 28
Curve-billed Thrasher (Steve Mlodinow) first 4/8
++++Lake Cheraw
Bonaparte's Gull (3) (David Stejskal/Mlodinow) (first 4/2) 21; last 4/8

Prowers County
++++Lamar Community College Library
Northern Cardinal (Mike McCloy) last 4/8


Kiowa County
++++Upper Queens Reservoir & area
Caspian Tern (Jill White Smith) first 4/10
Burrowing Owl --CR WW (Eric Hough) first 4/9

Kit Carson County
++++County Road K
Mountain Plover
(2) --CR K/btw CR 57 &CR 56 (Eric Hough) first 4/10

Lincoln County
++++County Road 41 area
Long-billed Curlew (16) --3F/btw CR 41 & CR 39 (Mike McCloy) first 4/9
Chestnut-collared Longspur
(120) --CR 3F/west/CR 41 (Stephen Lorenz/McCloy) (first 4/4) 7; last 4/9
(100) --CR 41/south/CR 3G (Sommers/Cheri Phillips) (first 4/4) 3; last 4/9
(8) --CR 3F, west/CR 42 (Joe Blanda) last 4/9
Mountain Plover
(3) --CR 3F/east/CR 40 (McCloy) first 4/9
(2) --CR 43 (Tom Johnson) first 4/8
Chestnut-collared Longspur (15) --CR 43 (Tom Johnson) first 4/8
++++County Road P & CR 36
Mountain Plover (2) (John Vanderpoel) first 4/8
++++County Road 43 area
Mountain Plover (2) --CR 43/south/hwy 24 (Tom Johnson) first 4/8
Chestnut-collared Longspur (2) --CR 43/south/hwy 24 (Tom Johnson) first

Morgan County
++++Brush Prairie Ponds Wildlife Area
Willet (Sherri Hansen) first 4/8

Yuma County
++++County Road 45
Burrowing Owl (7) --west/hwy 385 (Ruth Richards) first 4/9
++++CR 45
Greater Prairie-Chicken --Between Hwy 385 and Lek, 1.7 miles/east/hwy 385
(Stevens:Kosten/Art Hudak) 2; (first 2/18) last 4/8
(Between Hwy 385 and Lek, 1.7 miles/east/hwy 385)
++++Wray Fishing Unit
Eastern Bluebird (2) (CoBus/Eric Hough) (last 1/1) 4; last 4/8


Archuleta County
++++Pinon Lake Reservoir
Trumpeter Swan (considered a released or TAME bird) last 4/6

Chaffee County
++++Monarch Pass
American Three-toed Woodpecker (2) (Stevens & all/Hansen & all) (first
3/5) 2; last 4/10
++++Chaffee County
Lewis's Woodpecker
(1) --San Juan Avenue (Simon Harvey) last 4/10
(1) --Gunnison Avenue (Stephan Lorenz) last 4/10
Williamson's Sapsucker
(6) --CR 368/CR 361 (Hagenlocher) first 4/8
Pinyon Jay
(100) --Pinyon Hills (see map) (Michael O'Brien) last 4/7
(6) --CR 356-7 (Hagenlocher/O'Brien) (first 4/6) last 4/7
++++Sands Lake Wildlife Area
Barrow's Goldeneye (8) (Gwen Moore/Michael O'Brien) (first 11/13) 1; last

Clear Creek County
++++Loveland Pass
White-tailed Ptarmigan (see website for additional locations)
(1) --(Simon Harvey) last 4/10
(2) --below east summit (Stevens & Stein/Scott Downes) (first 1/21) 2;
last 4/8
++++Guanella Pass
American Three-toed Woodpecker --Campgrounds (Stevens:Kosten/Craig
Robson) (first 9/25) 3; last 3/28
White-tailed Ptarmigan (Stevens:Kosten/Doug Kibbe & all) (first 9/25) 16;
last 2/16

Delta County
++++Fruitgrower's Reservoir area
Lewis's Woodpecker (2) --Meyers Road (Stevens & all/Jordan Roderick:David
Stejski) (first 3/4) last 4/7

Fremont County
++++Tunnel Drive area
Rufous-crowned Sparrow (Jan Hansen) last 4/10
++++Canon City
Black Phoebe(2) --1st Street bridge over Arkansas River (Moss) reported
(2) --MacKenzie Avenue bridge over Arkansas River (Adams/Moss) (first
3/19) reported 4/10
++++Arkansas Riverwalk
Black Phoebe --Sells Pond area (Setta Moss) 2; reported 4/10
++++Florence River Park
Black Phoebe (Rich Miller/Moss) (first 3/22) reported 4/10
++++Wetmore Area
Lewis's Woodpecker (2) --County Road 19 (Jan Hansen) first 4/10

Garfield County
++++Spring Park Reservoir
Barrow's Goldeneye (50) (Dick Filby) first 4/8

Grand County
++++Windy Gap Reservoir
Barrow's Goldeneye (10) (Noreen Baker/Roderick:Hepburn) (first 3/13) 15;
last 4/10
++++Rabbit Ears Pass
American Three-toed Woodpecker --maintenance shed road (Stevens) (first
3/14) last 4/9

Gunnison County
++++Waunita Hot Springs Area
Gunnison Sage-Grouse (up to 25) (Stevens & all/Richard Sayles) (first
3/5) 4; last 4/8
++++Crested Butte
Brown-capped Rosy Finch (150) --94 Aspen Lane (Roderick:Sommers/Sabrina
Hepburn) (first 4/6) 50; last 4/7
Black Rosy Finch (6) --94 Aspen Lane (Horak/Hepburn) (first 4/5) 1; last
Gray-crowned Rosy Finch (50) --94 Aspen Lane (Horak/Hepburn) (first 4/5)
last 4/7
++++Blue Mesa Reservoir
Barrow's Goldeneye (3) --east end (David Stejskal:Jordan Roderick) first

Jackson County
++++County Road 26b
Greater Sage-Grouse (up to 117) --CR 26b (Stevens:Michaels/David
Stejskal) (first 12/17) 98; last 4/10
++++Walden Reservoir
Bonaparte's Gull (Ruben & Victor Stoll/Gavin Bieber) (first 4/1) 20; last
++++Colorado State Forest
Boreal Owl
(2) --from Hwy 14, west of Cameron Pass
(Stevens:Kosten/Montegomery:Barkley) (first 3/1) 3; last 4/10
Brown-capped Rosy Finches
(15) --at Visitor's Center (Montgomery:McCormick:Richards) 1; last 4/10
American Three toed Woodpecker (m) --Across Hwy 14/north of Colorado
State Forest Visitor's Center (Stoll) last 4/1

La Plata County
++++Pastorius Reservoir
Bonaparte's Gull (1) (Susan Allerton) first 4/10

Mesa County
++++Cameo/Coal Canyon
Pinyon Jay (2) Stevens & all/Goodrich:Troth) (first 3/3) 1; last 4/10
Black-throated Sparrow (2) (Hansen:Gabriel:Pitts/Goodrich:Troth) (first
4/4) last 4/10
Chukar (2) Stevens & all/Joan Baker) (first 3/3) last 4/9
++++2.8 Road area North of Old Highway 6/50
Sagebrush Sparrow (3) --2 Road (Cameron Cox) first 4/10
Brewer's Sparrow (2) --2 Road (Cameron Cox) first 4/10
Sage Thrasher --2 Road (Mike Henwood/Cox) (first 4/8) last 4/10
++++Baxter Pass Road
Sagebrush Sparrow (1) --CR 4 (Stevens & all) (first 3/4) last 4/8
++++Colorado National Monument
Pinyon Jay (8) (Stevens & all) last 4/8
Black-throated Sparrow (2) --eastern entrance (Stevens) first 4/8
++++Clifton Nature Park Trail
Barn Owl --Clifton Nature Park trail (Vollmar/Mike Henwood) (first 3/19)
last 4/8
++++State Line Area/Brewster Ridge
Sagebrush Sparrow (6) (Mike Henwood) last 4/8
++++Grand Mesa North
Boreal Owl --south of Spruce Grove Campgrounds (Stevens & all) (first
3/3) 2; last 4/8
Northern Pygmy-Owl --Powderhorn Ski area (Stevens & all) first 3/13
Lewis's Woodpecker (2) --G Road (Joan Baker) first 4/8

Moffat County
++++Oxbow Wildlife Area
Sage Thrasher (Stevens/Tresa Moulton) (first 3/14) last 4/6

Montezuma County
++++Cortez Municipal Airport area
Black-throated Sparrow (3) (Simone Marler) first 4/6

Montrose County
++++Black Canyon of Gunnison National Park
Dusky Grouse (Stevens & all/Michael Hilchey) (first 3/4) 7; last 4/9
(South Rim Drive & Campgrounds)
Fox Sparrow (2, slate colored) (Roderick) last 4/9
Williamson's Sapsucker --Campgrounds (Jordan Roderick) first 4/7
(NOTE: South Rim Road is closed at Visitor's Center)

Rio Blanco County
++++Rio Blanco Reservoir
Common Loon (Gavin Bieber) first 4/10

Routt County
++++Steamboat Springs
Sharp-tailed Grouse --Lincoln Ave/13th street (Joan Baker) first 4/10
++++80 Route Leks
Dusky Grouse (Stevens & all/Casey Weissburg) (first 4/9) last 4/10
Greater Sage-Grouse (several heard from cattle guard) (Stevens & all)
first 4/9
++++Twenty Road Leks
Sharp-tailed Grouse (5) (Stevens & all) (first 3/3) last 4/9
++++Stagecoach State Recreation Area
Barrow's Goldeneye (5) (Litteral/Joan Baker) (first 3/25) 2; last 4/10
Common Loon (Craig Robson/Joan Baker) (first 4/8) last 4/10

Saguache County
++++Russell Lakes Wildlife Area
Short-billed Dowitcher (John Cobb) (reported 4/8) last 4/9

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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