Date: 9/25/18 5:01 am
From: Amy Davenport <cobussec...> [cobirders] <cobirders-noreply...>
Subject: [cobirders] Colorado Rare Bird Alert for September 25, 2018
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: 9/24/2018
Arapahoe (Sabine's Gull)
Archuleta (Lewis's Woodpecker)
Boulder (Red-eyed Vireo, Pectoral Sandpiper)
Denver (Sage Thrasher)
El Paso/Pueblo (Eastern Phoebe, Cassin's Vireo, Philadelphia Vireo,
Curve-billed Thrasher, Sage Thrasher, Northern Mockingbird, Ovenbird,
Nashville Warbler, Ladder-backed Woodpecker, Sedge Wren)
Fremont (Eastern Phoebe)
Hinsdale (Gray Flycatcher)
Jefferson (Northern Pygmy-Owl, American Three-toed Woodpecker, Flammulated
Larimer (Broad-winged Hawk, American Three-toed Woodpecker)
Mesa (Gray Vireo, Green Heron, Gray Flycatcher, Cassin's Vireo, Sage
Montrose (Red-necked Phalarope, Gray Flycatcher, Pinyon Jay)
Prowers (Chestnut-sided Warbler, Ruby-throated Hummingbird)
Pueblo (Black Phoebe, Eastern Phoebe, Ladder-backed Woodpecker,
Curve-billed Thrasher)


Adams County
++++Barr Lake
Pectoral Sandpiper --off banding station (Ian Redfield) last 9/23
Cassin's Vireo (Ian Redfield) last 9/23
Red-eyed Vireo (McBurney/Redfield) (first 9/19) last 9/23
++++Rocky Mountain Arsenal
Sage Thrasher (Vince Howard) last 9/23
Cassin's Kingbird (2) (Sheeter) last 9/22
Tennessee Warbler (Cathy Sheeter) first 9/22
Northern Mockingbird --Lower Derby Lake (Sarah Leavesley) first 9/22

Adams/Denver Counties
++++First Creek Trail
Cassin's Vireo --Adams Cty (John Breitsch) first 9/23
Cassin's Vireo --Denver Cty (John Breitsch) first 9/23
Cassin's Kingbird --Denver Cty (John Breitsch) last 9/22

Arapahoe County
++++Aurora Reservoir & area
Sabine's Gull --southeast corner (Stevens:Kosten) first 9/24
Probable Bonaparte's Gull (Stevens:Kosten) first 9/24

Boulder County
++++Pleasant View Marsh
Red-eyed Vireo (Bill Kaempfer) first 9/24
Prothonotary Warbler (Ernest Crvich/Peter Burke) (first 9/22) last 9/23
Townsend's Warbler (Christian Nunes) first 9/23
++++Walden Ponds
Pectoral Sandpiper (Luke Pheneger:Dan Zmolek) first 9/24
++++Golden Ponds
Eastern Phoebe (Luke Pheneger) first 9/22
Cassin's Vireo (Pheneger) first 9/22
++++Lagerman Reservoir
Burrowing Owl (Rob Cassady:Steve Frye) first 9/22

Broomfield County
++++Plaster Reservoir
American Bittern --southeast side (Eric Zorawowitz/Linda Lee) (first
9/15) last 9/23

Denver County
++++Bluff Lake Nature Area
Sage Thrasher (George Ho) first 9/24
Green Heron (George Ho/Dave King) (first 6/21) last 9/21
++++Denver City Park
Cassin's Vireo --near Ferril Lake (Dave King) first 9/22

Douglas County
++++Noodle Head Trail Area, Pike National Forest
Sage Thrasher (2) (Greg Schrab) first 9/23
Townsend's Warbler (Greg Schrab) first 9/23
(Above: west of Hwy 67, south/old logging road/ btw Noodle Head Trail &
Sugar Creek)

El Paso County
++++Pikes Peak
Dusky Grouse (4) --Glen Cove (Dawn Wellington) first 9/22
++++Fox Run Regional Park
Black-throated Gray Warbler (Jan Allbright:Richard Bunn) first 9/21
++++Sand Creek
Cassin's Vireo --Dublin Blvd to Woodmen Road (Alan Versaw) first 9/21

El Paso/Pueblo Counties County
++++Chico Basin Ranch (fee area)
Eastern Phoebe (John Drummond:Ketcham) first 9/24
Cassin's Vireo (Kim Geissler/Drummond) (first 9/8) last 9/24
Philadelphia Vireo (Geissler/John Drummond) (first 9/22) last 9/24
Curve-billed Thrasher (Drummond) last 9/24
Sage Thrasher (Drummond) last 9/24
Northern Mockingbird (2) (Drummond) last 9/24
Ovenbird (2) (Christine Alexander/Drummond) (first 9/23) 2; last 9/24
Nashville Warbler (Drummond) first 9/24
(above: banding station unless stated elsewhere, El Paso County)
Ladder-backed Woodpecker (John Drummond) last 9/24
Sedge Wren (John Drummond) last 9/24
Curve-billed Thrasher (Drummond) last 9/24
(all above: Headquarters, Pueblo County)
Sedge Wren --below southeast side of dam (David Tonnessen) first 9/21
(all above: Rose Pond, Pueblo County)

Jefferson County
++++Wellington Lake
Northern Pygmy-Owl (Lindsay Purifoy) first 9/24
American Three-toed Woodpecker (Lindsay Purifoy) first 9/24
Flammulated Owl (Purifoy) last 9/23
++++Deer Creek area
Eastern Phoebe (2) --Deer Creek at Buckhorn Road (Washburn:Thompson) last
++++South Valley Park
Sage Thrasher (4) (Gwen Moore/Washburn:Thompson) (first 9/12) 1; last 9/22
++++Lair 'O Bear Park
Sage Thrasher (Bruce Cyganowski/Santiago Tabares) (first 9/6) last 9/22
++++Corwina Park
Northern Pygmy-Owl (Reed Gomer) first 9/21

Larimer County
++++Grandview Cemetery
Broad-winged Hawk (David Leatherman/Joe Kipper) (first 9/19) last 9/24
Townsend's Warbler (David Wade/Leatherman) (first 9/16) last 9/23
++++Rocky Mountain National Park
American Three-toed Woodpecker (2) --Hidden Valley Creek (Nathan Senner)
last 9/24
Northern Saw-whet Owl (2) --Hidden Valley (Komar:Wehtje) last 9/23
Boreal Owl --Hidden Valley (Stevens/Gloria Nilolai) (first 6/11) last 9/21
American Three-toed Woodpecker (1) --Rainbow Curve (Carl Bendorf) 2; last
Brown-capped Rosy Finch (250) --Lava Cliffs pullover (Carl Bendorf) last
++++Boyd Lake State Park
Lesser Black-backed Gull --Seven Lakes Park (John Shenot) first 9/23
++++Horseshoe Lake
Mexican Duck (Nick Komar) (first 9/22) last 9/23
Mew Gull --pond north of lake (Nick Komar) (first 9/19) last 9/22
++++Duck Lake
Red-necked Phalarope (John-Edd Brown/Lori Pivonka) (first 9/16) 3; last
++++North Poudre Reservoir #3
Sabine's Gull (Nick Komar:David Wade) first 9/22
++++Wellington Wildlife Area, Cobb Lake
Cassin's Vireo (Olson:Bankert/Komar) (first 9/16) last 9/22
++++Near Rawhide Reservoir
Townsend's Warbler (2) --Oasis/east/Rawhide (Nick Komar) first 9/22
++++Schware Unit, Wellington Wildlife Area
Long-eared Owl (4) (Nick Komar) first 9/22
++++Prospect Ponds Natural Area
Green Heron (Jay Breidt) (first 6/11) 1; 9/22
Barn Owl (Paul Ode) first 9/22
++++Spring Canyon Community Park
Eastern Screech-Owl (Paul Ode) last 9/22

Las Animas County
++++Hwy 350, near Purgatoire River
Rose-breasted Grosbeak --see map (Ruth Stearns) first 9/22

Pueblo County
++++Runyon Lake
Black Phoebe (Mark Yaeger) first 9/24
Eastern Phoebe (Mark Yaeger) first 9/24
++++Pueblo Reservoir
Ladder-backed Woodpecker --sailboard launch area (M.OB.) first 9/24
Curve-billed Thrasher --south marina area (M.OB.) last 9/24

Weld County
++++Norma's Grove
Long-eared Owl --CR 100/east/CR 57 (Dean Shoup) first 9/23
Eastern Bluebird (Gene Rutherford) first 9/23
++++Crow Valley
Least Flycatcher (Joey Kellner/Dean Shoup) (first 9/14) last 9/23
Black-throated Gray Warbler (Kellner:Shoup) first 9/23
++++Pawnee National Grasslands area
Chestnut-collared Longspur (9) --CR 105/north/CR 80 (Dean Shoup) first


Lincoln County
++++County Road L, west of CR 19
Mountain Plover (12) (Joey Kellner:Dean Shoup) first 9/21

Prowers County
++++Lamar Community College
Chestnut-sided Warbler (Jill Smith) first 9/24
Ruby-throated Hummingbird 2 male, 1 female; (Dorothy Russell) (first
9/16) 1; last 9/24


Kit Carson County
++++Flagler Reservoir
Possible Yellow-bellied Flycatcher (Stevens:Michaels) reported 9/23
Cassin's Vireo (Stevens:Michaels) first 9/23
++++Fairview Cemetery, Burlington
Broad-winged Hawk (Stevens:Michaels) first 9/23
++++Fairview Cemetery, Burlington
Broad-winged Hawk (Stevens:Michaels) first 9/22

Logan County
++++North Sterling Reservoir and Area
Black-bellied Plover (Dowell) first 9/22
Sabine's Gull (David Dowell) first 9/22

Logan/Sedgwick Counties
++++Jumbo Reservoir
Black-bellied Plover (2) (Dowell) first 9/22
Sabine's Gull (Dowell) first 9/22
Common Tern (Stevens:Michaels/Dowell) (first 9/19) last 9/22
Eastern Bluebird (2) (Dowell) first 9/22

Morgan County
++++Jackson Reservoir & area
Semipalmated Plover --north side (Dean Shoup) (first 9/2) 1; last 9/23

Phillips County
++++Holyoke Fishing Pond
Alder Flycatcher (Stevens:Michaels) first 9/21

Yuma County
++++Bonny Reservoir Area
Burrowing Owl (2) --Pipit Hill (David Dowell) first 9/23
Red-headed Woodpecker (2) --Fosters Grove (Washburn:Thompson/Dowell) last
Northern Cardinal (Dowell) last 9/23
Eastern Phoebe --wagon wheel (Dean Shoup/Stevens:Michaels) (first 9/16)
last 9/22
Palm Warbler (Stevens:Michaels) first 9/22
Nashville Warbler (Stevens:Michaels) first 9/22
Eastern Screech-Owl (Stevens:Michaels) last 9/22
(Bonny Reservoir Wildlife Area)
Red-headed Woodpecker (Dowell) last 9/23
Blue-headed Vireo (Stevens:Michaels) first 9/22
Mourning Warbler (Stevens:Michaels) first 9/22
Eastern Bluebird (Stevens:Michaels) last 9/22
Gray-cheeked Thrush (Stevens:Michaels) first 9/22
Yellow-billed Cuckoo (Stevens:Michaels) last 9/22
Magnolia Warbler (Stevens:Michaels) first 9/22
Eastern Screech-Owl (Stevens:Michaels) last 9/22
(Hale Ponds)


Alamosa County
++++Blanca Wetlands See Pond
Marbled Godwit (2) (David Dowell/Gary Koehn) (first 9/17) last 9/23
Red-necked Phalarope (8) (Dowell/Koehn) (first 9/17) 2; last 9/23
Sage Thrasher (3) (Dowell/Koehn) (first 9/17) last 9/23

Archuleta County
Pagosa Springs & area
Lewis's Woodpecker (4) --Forest Road 012, Blue Creek Road (Anthony Orona)
last 9/24

Clear Creek County
++++Guanella Pass
White-tailed Ptarmigan --Bierstadt trail (Frank Farrell) 6; last 9/23

Delta County
++++Confluence Park
Greater White-fronted Goose (Adam Cupito) first 9/23

Fremont County
++++Arkansas Riverwalk
Eastern Phoebe --Sells Pond to Raynolds Avenue (Catherine Olin) last 9/24
Black Phoebe --MacKenzie Avenue bridge (Elaine Wagner:Doug Kibbe) last
++++Tunnel Drive area
Rufous-crowned Sparrow (4) (Kibbe:Wagner) last 9/22

Hinsdale County
++++Brown Lakes Wildlife Area
Gray Flycatcher (Kathy Mihm-Dunning) first 9/24

La Plata County
++++Vallecito Reservoir
Sabine's Gull (imm) (Jason St. Pierre) first 9/22

Mesa County
++++Connected Lakes State Park Area
Gray Vireo (Adam Cupito) first 9/24
++++Horsethief Canyon Wildlife Area
Green Heron (Mike Henwood) first 9/24
Gray Flycatcher (Henwood) last 9/24
Cassin's Vireo (Douglas Diekman/Henwood) (first 9/18) last 9/24
Sage Thrasher (David Price) first 9/24
++++Grand Junction Wildlife Area
Sagebrush Sparrow (3) (Mike Henwood) first 9/22
++++Horsethief Canyon Wildlife Area
Gray Flycatcher (Douglas Dekman) last 9/22
++++Little Salt Wash Park
Broad-winged Hawk (adult dark morph) (Brett Walker) reported 9/22

Montrose County
++++Nucla Town Reservoir
Red-necked Phalarope (Dexter:Wright) first 9/24
Gray Flycatcher (Dexter:Wright) first 9/24
Pinyon Jay (52) --East 5th Avenue (Dexter:Wright) last 9/24
++++Ridgway State Park
Gray Vireo --Dallas Creek (Wright:Dexter) first 9/23
Sage Thrasher (Wright:Dexter) first 9/23
Nashville Warbler --Dallas Creek (Adam Cupito/Wright:Dexter) (first 9/6)
3; last 9/23
++++Yankee Boy Basin
Brown-capped Rosy Finch (2+) --Mt Sneffels (CoBus Groups/KW) (first 6/30)
last 9/23

Ouray County
++++Ouray and Box Canyon Falls
Cassin's Vireo (2) --Amphitheater Campgrounds (Wright:Dexter) first 9/22

Routt County
++++King Mountain Trail
Sagebrush Sparrow (JoAnn Riggle) first 9/21

Good Birding!

Directions to birding spots and s on CoBus website:

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