Date: 9/11/17 5:16 am
From: Amy Davenport <cobussec...> [cobirders] <cobirders-noreply...>
Subject: [cobirders] Colorado Rare Bird Alert for September 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: To reduce length of report, only recent sightings listed; visit
Colorado Birding Society's website everyday for additional sightings!

Reports added: 9/10/2017
Adams (American Redstart, Least Flycatcher)
Denver (Wild Turkey)
El Paso (Ladder-backed Woodpecker, Sage Thrasher, Northern Mockingbird)
El Paso/Pueblo (Olive-sided Flycatcher, Curve-billed Thrasher, Northern
Mockingbird, Black-and-white Warbler, Cassin's Sparrow, Dickcissel)
Larimer (Lesser Black-backed Gull, Sabine's Gull, Caspian Tern,
Brown-capped Rosy Finch)
Pueblo (Cassin's Vireo)
Weld (Red-eyed Vireo, Ovenbird, Black-throated Gray Warbler, Least
Flycatcher, Chestnut-collared Longspur)
Kiowa (Black-bellied Plover, American Golden-Plover, Semipalmated Plover,
Long-billed Curlew, Marbled Godwit, Buff-breasted Sandpiper, Pectoral
Sandpiper, Short-billed Dowitcher, Dickcissel, Black-billed Cuckoo, Great
Crested Flycatcher, Palm Warbler, Indigo Bunting, Northern Waterthrush,
American Redstart, Chestnut-sided Warbler)
Logan/Washington (Semipalmated Plover, Long-billed Curlew, Marbled Godwit,
Buff-breasted Sandpiper, Pectoral Sandpiper, Lesser Black-backed Gull,
Common Tern, Ovenbird, American Redstart, Chestnut-sided Warbler)
Garfield (Black Phoebe)
Montezuma (Black Phoebe)
Ouray (Cassin's Vireo, Townsend's Warbler, Gray Vireo)


Adams County
++++Barr Lake
American Redstart --banding station (McBurney) first 9/10
Townsend's Warbler (McBurney) last 9/9
Cassin's Vireo (McBurney) last 9/9
Nashville Warbler (Tracy Rackauskas) first 9/9
++++Rocky Mountain Arsenal
Least Flycatcher (Rebecca Laroche) first 9/10
Mississippi Kite --flyover Ladora to Havana Ponds (Jacob Washburn) first
Sage Thrasher (4+) --Rattlesnake Hill parking area (Stevens/Washburn)
(first 9/4) 1; last 9/9
Nashville Warbler (2) --Adams cty section (John Breitsch) first 9/8

Adams/Denver Counties
++++First Creek Trail
Nashville Warbler (2) --Adams cty section (John Breitsch) first 9/8
++++DIA Owl Loop
Burrowing Owl (1) --W. Cargo Road & Third Creek (Stevens:Kosten) last 9/4

Boulder County
++++Walden Ponds
Chestnut-sided Warbler (Mark Holmgren) first 9/8
Williamson's Sapsucker (imm) (Ted Floyd) first 9/8
++++Lagerman Reservoir
Semipalmated Plover (2) (Luke Pheneger) first 9/8
Common Tern (Pheneger) first 9/8
++++Wild Basin Section of Rocky Mountain National Park
Black Swift (4) --Ouzel Falls (Myron Gerhard) last 9/6

Denver County
++++Bluff Lake Nature Area
Wild Turkey --east of Lake (Washburn/Jason Bidgood) (first 8/16) last
Least Flycatcher (Jacob Washburn/Loch Kilpatrick) (first 9/6) last 9/8

El Paso County
++++Hanover Road and area
Ladder-backed Woodpecker --at Old Pueblo Road (Diane Roberts) (first 9/5)
last 9/10
Sage Thrasher (2) (Diane Roberts) first 9/10
Northern Mockingbird --at Old Pueblo Road (Diane Roberts) (first 9/5)
last 9/10
Greater Roadrunner (1) (Diane Roberts/Norm Lewis) (first 7/28) last 9/8
++++Clear Spring Ranch
Tennessee Warbler (Steve Brown) first 9/8
Northern Waterthrush (Steve Brown) last 9/8
++++Blodget Peak Open Space
Williamson's Sapsucker (Bruce Nygaard) last 9/8

El Paso/Pueblo Counties
++++Chico Basin Ranch (fee area)
Olive-sided Flycatcher --wooded areas (Kurt Mize/David Tonnessen) (first
8/19) 3; last 9/10
Curve-billed Thrasher (1) (David Tonnessen) last 9/10
Red-eyed Vireo (Aaron Yappert/Driscoll) (first 9/5) last 9/9
Northern Mockingbird --banding station (Aaron Yappert/Tonnessen) 4; last
Black-and-white Warbler (Yappert/Diane Roberts) (first 9/4) last 9/10
Cassin's Sparrow (Tonnessen) last 9/10
Dickcissel (2) (Robb Hinds/Tonnessen) (first 9/9) 3; last 9/10
Ladder-backed Woodpecker (Aaron Yappert) 2; last 9/8
(all above: banding station area, unless otherwise stated)
(All above: El Paso County)
Cassin's Kingbird --HQ (Aaron Yappert) last 9/8
Cassin's Sparrow (Lewis) last 9/8
Cassin's Vireo --headquarters (Norm Lewis) last 9/8
(All above: Pueblo County)

Jefferson/Douglas County
++++Chatfield Reservoir area
Sabine's Gull (5) --east of marina sandspit (Joey Kellner/Marion & John
Warren) (first 9/3) last 9/9
Lesser Black-backed Gull --marina sandspit (Holden:Glass/Stevens) (first
8/26) last 9/8
++++Hildebrand Ranch Park
Eastern Phoebe (Stevens) first 9/8
Indigo Bunting (Stevens) first 9/8

Larimer County
++++Arapahoe Bend Natural Area
Lesser Black-backed Gull (Walter Wehtje) first 9/10
++++Timnath Reservoir Map
Sabine's Gull (Walter Wehtje) first 9/10
Caspian Tern (4) (Joe Mammoser/Komar) (first 8/16) 1; last 9/10
++++Horseshoe Lake Map
Sabine's Gull (Nick Komar) first 9/10
++++Rocky Mountain National Park
Brown-capped Rosy Finch (50) --Medicine Bow Curve (John Oliver) last
++++Hewlett Gulch
Lewis's Woodpecker (5) (Lori Zabel/John Shenot) (first 9/3) last 9/9

Pueblo County
++++Pueblo Reservoir
Cassin's Vireo --Cottonwood picnic area (Art Hudak) first 9/10
Black-throated Green Warbler --Cottonwood picnic area parking lot
(Percival/Kathy Miller) (first 9/7) last 9/9
Eastern Phoebe Cottonwood/Snakeskin picnic areas (Percival) last 9/9
++++Valco Ponds
Black Phoebe (1) (Mark Yaeger) last 9/9
Eastern Phoebe (4) (Mark Yaeger) last 9/9

Weld County
++++Crow Valley Campground
Red-eyed Vireo (Gene Rutherford) first 9/10
Ovenbird (Cynthia Kristensen/Rutherford) (first 9/7) last 9/10
Black-throated Gray Warbler (Austin Hess) first 9/10
Blue-headed Vireo (Ryan Graves) reported 9/9
Olive-sided Flycatcher (Ryan Graves) first 9/9
Black-and-white Warbler (Ryan Graves) first 9/9
Nashville Warbler (Kellner/Graves) (first 9/8) last 9/9
Blackpoll Warbler (Graves) first 9/9
Tennessee Warbler (Norm Erthal) reported 9/8
++++Norma's Grove
Least Flycatcher (Jean Olson) (first 9/3) last 9/10
Red-headed Woodpecker (Ryan Graves) last 9/9
Cassin's Kingbird (Rutherford/Graves) (first 9/8) last 9/9
Tennessee Warbler (Graves) first 9/9
++++Pawnee National Grasslands area
Chestnut-collared Longspur (15) --CR 47/south/CR 116 (Laroche/Jean Olson)
(first 8/19) 1; last 9/10
++++Behrens Reservoir
Dickcissel (1) (Gene Rutherford) (first 7/16) reported 9/8
++++Beebe Draw Ponds area
Burrowing Owl (2) --CR 42 (Rutherford) last 9/8
Red-necked Phalarope --CR 42 (Gary Lefko) first 9/7


Bent County
++++Tempel Grove
Blue-headed Vireo (Percival/Drummond) (first 9/5) last 9/8
Possible Black-billed Cuckoo (John Drummond) reported 9/8

Kiowa County
++++Lower Queens & Upper Queens Reservoirs
Black-bellied Plover (Steve Mlodinow) first 9/10
American Golden-Plover (Mlodinow) reported 9/10
Semipalmated Plover (2) (Mlodinow) first 9/10
Long-billed Curlew (Mlodinow) first 9/10
Marbled Godwit (3) (Mlodinow) first 9/10
Buff-breasted Sandpiper (2) (Mlodinow) first 9/10
Pectoral Sandpiper (10) (Mlodinow) first 9/10
Short-billed Dowitcher (Mlodinow) reported 9/10
Dickcissel (Mlodinow) first 9/10
Black-billed Cuckoo --Upper Queens (Mlodinow) reported 9/10
Great Crested Flycatcher --Upper Queens (Mlodinow) first 9/10
Palm Warbler --Upper Queens (Mlodinow) first 9/10
Indigo Bunting --Upper Queens (Mlodinow) first 9/10
(all at Lower Queens Reservoir unless otherwise stated)
++++Neenoshe Reservoir
Northern Waterthrush (Steve Mlodinow) first 9/10
American Redstart (3) (Mlodinow) first 9/10
Chestnut-sided Warbler (Mlodinow) first 9/10


Logan/Washington Counties
++++Prewitt Reservoir area
Semipalmated Plover (Mlodinow/Aaron Yappert) (first 8/29) 2; last 9/10
Long-billed Curlew (Yappert) first 9/10
Marbled Godwit (Blue/Yappert) (first 8/24) 3; last 9/10
Buff-breasted Sandpiper (Mihm-Dunning/Yappert) (first 9/8) last 9/10
Pectoral Sandpiper (Mihm-Dunning/Yappert) (first 9/8) 19; last 9/10
Lesser Black-backed Gull (Bill Kaempfer & all/Yappert) (first 9/9) last
Common Tern (Walbek/Kaempfer & all/Yappert) (first 9/8) last 9/10
Ovenbird (Susan Wise) first 9/10
American Redstart (1) (Mihm-Dunning/Susan Wise) (first 9/8) last 9/10
Chestnut-sided Warbler (Chavez:Hudak/Susan Wise) (first 9/9) last 9/10
Mississippi Kite (Kaempfer:Vanderpoel) first 9/9
American Golden-Plover (Kathy Mihm-Dunning) first 9/8
Red-necked Phalarope (8) (Mihm-Dunning/Kaempfer & all) (first 9/8) 5;
last 9/9
Black-and-white Warbler (Walbek/Kaempfer & all) (first 9/8) last 9/9
Northern Parula (Mihm-Dunning/Mark Chavez:Art Hudak) (first 9/8) last 9/9
Bay-breasted Warbler (Mihm-Dunning/Loch Kilpatrick) (first 9/8) last 9/9
(best shorebird location: southwest corner/access from inlet canal)
(best passerine location: inlet canal grove)

Washington County
++++Last Chance Rest Stop
Cassin's Vireo (David Dowell/Chavez:Hudak) (first 9/1) last 9/9
American Redstart (Mark Miller/Chavez:Hudak) (first 8/27) last 9/9
++++Washington Country Club Golf Course Park
Chestnut-sided Warbler (Glenn Walbek) first 9/8

Yuma County
++++Yuma County Road 45
Greater Prairie-Chicken (7) (Stevens:Kosten/Stevens:Michaels) (first
2/18) 2; last 9/7
--Between Hwy 385 and Lek, 1.7 miles/east/hwy 385
++++Sandhiller Motel, Wray
Blue-headed Vireo --cottonwood, east end of parking lot
(Stevens:Michaels) first 9/7
++++Stalker Pond
Northern Cardinal (2) (Stevens:Michaels) last 9/7
Northern Waterthrush (Stevens:Michaels) first 9/7
++++Wray Fishing Unit
Olive-sided Flycatcher (Stevens:Michaels) first 9/7
Northern Cardinal (Stevens:Michaels) last 9/7
++++Sandsage Wildlife Area
Red-headed Woodpecker (Stevens:Michaels) last 9/7
Bell's Vireo (Stevens:Michaels) first 9/7
++++Wray City Park
Red-headed Woodpecker (Stevens:Michaels) first 9/7
++++Bonny Reservoir Area
See Website for many 9/6 Birds


Alamosa County
++++Cattails Golf Course
American Redstart --black tee/ Cougar Woods (John Rawinski) first 9/8
++++Blanca Wetlands
Snowy Plover --Pond 46 (Daniel Toronto:Leah Dodd/John Rawinski) (first
7/16) last 9/8

Chaffee County
++++Chaffee County
Lewis's Woodpecker (1) --Buena Vista Nature trail (David Webb) last 9/7

Clear Creek County
++++Mt. Evans Road
Brown-capped Rosy Finch (12) --summit (Will McPhail) last 9/9
Barrow's Goldeneye (2+) --Echo Lake (Dave King/Lorraine Lanning) (first
5/11) 5; last 9/5
American Three-toed Woodpecker (1)--Echo Lake
(Fontenot:Bezuidenhout/Lorraine Lanning) (first 7/16) last 9/5

Garfield County
++++Rifle Rest Stop
Black Phoebe (Sondra W) first 9/10

Gunnison County
++++Mt. Crested Butte
American Three-toed Woodpecker (2) (Marcel Such) first 9/9

Mesa County
++++Horsethief Canyon Wildlife Area
Northern Waterthrush (Mike Henwood) first 9/8
(small pond along River Trail)

Montezuma County
++++San Juan River Crossing at Four Corners
Black Phoebe (2) (John Coons) first 9/10

Montrose County
++++Nucla Town Reservoir
Pinyon Jay (9) (Dexter:Wright) (first 8/6) 2; last 9/9
++++Black Canyon of Gunnison National Park
Dusky Grouse (1) --Campgrounds (John Coons) last 9/7

Ouray County
++++Baby Bathtubs portion of Ouray Perimeter
Cassin's Vireo (Jon Horn) first 9/10
Townsend's Warbler (Jon Horn) first 9/10
++++Ridgway State Park
Gray Vireo --Visitor's Center (Jon Horn) first 9/10
++++Ouray and Box Canyon Falls
Black Swift (2) (Glenn Walbek/Jon Horn) (first 6/11) 2; last 9/9
++++Billy Creek Wildlife Area
Black Phoebe (Kent Nelson/Jon Horn) (first 5/6) last 9/9
++++Ridgway (Moffat Street)
Lewis's Woodpecker (Jon Horn) first 9/9

Park County
++++Antero Reservoir
Long-tailed Jaeger (Steve Mlodinow/Joel Adams) (first 8/26) last 9/4

Saguache County
++++Russell Lakes Wildlife Area
American Bittern (2) (John & Kathy Keagle/JoAnn Riggle) (first 5/26) last

Summit County
++++North Tenmile Trailhead
Williamson's Sapsucker (male) (Jack & Ryan Bushong) first 9/9

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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