Date: 10/10/18 3:21 am
From: Amy Davenport <cobussec...> [cobirders] <cobirders-noreply...>
Subject: [cobirders] Colorado Rare Bird Alert for October 10, 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: 10/9/2018
Arapahoe (Western Gull, Bonaparte's Gull)
Boulder (Parasitic Jaeger, Lesser Black-backed Gull, Chestnut-sided
Warbler, Cassin's Vireo)
Jefferson (Tropical Kingbird, Swamp Sparrow)
Jefferson/Douglas (Sabine's Gull)
Larimer (Common Loon)
Mesa (Gray Flycatcher, Chestnut-sided Warbler)
Prowers (Pectoral Sandpiper)
Weld (Common Tern)


Adams County
++++Rocky Mountain Arsenal
Common Loon --Lake Ladora (south) (Orien Richmond) last 10/8
Cassin's Kingbird --Lake Ladora (south) (Orien Richmond) last 10/8
++++Barr Lake
Gray-cheeked Thrush --see map (Bez Bezuidenhout) reported 10/8
Great Crested Flycatcher --banding station (McBurney/Ely:Mlodinow) (first
10/6) last 10/7
Swamp Sparrow (Ely:Mlodinow) first 10/7
Field Sparrow (McBurney) first 10/7

Arapahoe County
++++Aurora Reservoir
Western Gull (1st cycle) (Mlodinow:Ely/Richard Stevens) (first 10/7) last
Bonaparte's Gull (Stevens) (first 10/8) last 10/9
Mew Gull (Stevens) first 10/8
++++Cherry Creek Reservoir
Red-necked Phalarope (3) (Mlodinow) first 10/7
Common Tern (2) (David Ely:Steve Mlodinow) last 10/7
Sabine's Gull (Mlodinow) first 10/7

Boulder County
++++Lagerman Reservoir
Parasitic Jaeger (Peter Burke/Michael King) (first 10/6) last 10/9
Lesser Black-backed Gull (Peter Burke/Mike Hensley:Dean Shoup) (first
10/6) last 10/9
Red-necked Phalarope (4) (Steve Frye/Peter) (first 9/29) 11; last 10/6
++++Ryssby Church & Cemetery
Chestnut-sided Warbler (David Dowell) first 10/9
Townsend's Warbler (David Dowell) first 10/9
++++Mayhoffer-Singletree Trail
Cassin's Vireo --east section to stone benches (Peter Ruprecht) first 10/9
++++Walden Ponds
Pectoral Sandpiper (Pheneger:Zmolek/Bill Kaempfer) (first 9/24) 1; last
Vermilion Flycatcher (male) --east/ Cottonwood marsh parking lot (Peter
Burke/David Leatherman) (first 9/29) last 10/8
Eastern Screech-Owl --western side (Bill Schretz) last 10/7
++++Coyote Run Open Space
Lewis's Woodpecker (Ryan Bushong) (first 10/7) last 10/9
++++Old St. Vrain Road & Area
Northern Parula (Mark Chavez) first 10/7
Magnolia Warbler (Dan Zmolek/Luke & Tracy Pheneger) (first 10/6) last 10/7
(0.2 miles west of bridge over creek)
++++Twin Lakes Open Space
Townsend's Warbler (Dan Zmolek) first 10/7
++++Rabbit Mountain Open Space
Sage Thrasher (4) (Peter Burke) first 10/7
++++Boulder Reservoir area
Fox Sparrow (? species) (Ron Podjahski) first 10/7

Denver County
++++Westerly Creek Park
White-throated Sparrow (John Cobb) first 10/7

Huerfano County
++++County Road 230
Eastern Phoebe (David Tonnessen) first 10/8
Sage Thrasher (David Tonnessen) first 10/8
++++Lathrop State Park
Mexican Duck (Tonnessen) reported 10/8

Jefferson County
++++South Platte Park Reservoir & Area
Tropical Kingbird (Frank Farrell:Michael Lester/Bill Kaempfer) (reported
10/5) last 10/9
(Seventh State Report, possible 2nd State Record)
++++Harriman Lake Park
Swamp Sparrow (Mark Chavez) first 10/9

Jefferson/Douglas County
++++Chatfield Reservoir
(NOTE: see directions on construction updates)
Sabine's Gull (Michael Lester/Mark Chavez) (first 10/5) 2; last 10/9
Common Loon (Dean Shoup/Chavez) (first 10/7) last 10/9
(NOTE: see directions on construction updates)

Larimer County
++++Strauss Cabin area/Rigden Reservoir
Common Loon (Komar:Wade/Lori Zabel:Robert Beauchamp) (first 10/7) last
++++Horseshoe Lake
Bonaparte's Gull (2) (Nick Komar) first 10/8
++++Cobb Lake Wildlife Area
(See Directions for Access)
Cassin's Kingbird (Nick Komar:Andy Bankert) first (first 10/7) last 10/8
Kingbirds (possible Cassin's & Couch's) (Andy Banert:Nick Komar) first
Drive 0.5 miles north on CR 3 from CR 56 to search for Kingbirds)
Sage Thrasher (Komar:Bankert) (first 10/4) 2; last 10/7
++++Greyrock Commons Trail
White-throated Sparrow (Doug Swartz) (first 9/26) last 10/7

Pueblo County
++++Pueblo Reservoir
Townsend's Warbler --Rock Canyon (Darth Aves) first 10/7
Eastern Phoebe (Darth Aves) 2; last 10/6
(Rock Canyon, below dam, north of Arkansas River)

Weld County
++++Union Reservoir & area
Common Tern (Steve Mlodinow) (first 9/15) last 10/9


Bent County
++++Tempel Grove
Winter Wren (Kathy Mihm-Dunning) first 10/7

Kiowa County
++++Neenoshe Reservoir
Black-bellied Plover (6) (Kathy Mihm-Dunning) first 10/7
Pacific Loon (Mihn-Dunning:Dowell) first 10/7
Chestnut-collared Longspur (3) (Mihn-Dunning:Dowell) first 10/7
++++Lower Queens Reservoir
Greater White-fronted Goose (7) (Kathy Mihm-Dunning:David Dowell) first

Otero County
++++Lake Holbrook
Black-bellied Plover (Kathy Mihm-Dunning) first 10/7
Marbled Godwit (3) (Kathy Mihm-Dunning) first 10/7
Pectoral Sandpiper (4) (Kathy Mihm-Dunning) first 10/7
Red-necked Phalarope (28) (Kathy Mihm-Dunning) first 10/7

Prowers County
++++North Gateway Park
Pectoral Sandpiper (Leukering) first 10/9


Morgan County
++++Jackson Reservoir & area
Sabine's Gull --north side (Norm Lewis/Doug Faulkner) (first 10/5) last

Yuma County
++++Sandy Bluffs State Trust Lands
Short-eared Owl (Anna Troth:Gregg Goodrich) first 10/7
Burrowing Owl (Kaempfer) first 10/6
Eastern Bluebird (2) (Bill Kaempfer) first 10/6
Sprague's Pipit (4) (Bill Kaempfer) first 10/6
++++Bonny Reservoir Area
Red-headed Woodpecker (Troth:Goodrich) last 10/7


Clear Creek County
++++Idaho Springs (2821 Riverside Drive)
Long-eared Owl (Matthew Wistrand) first 10/8
Black-throated Blue Warbler (Matthew Wistrand) reported 10/8
Townsend's Warbler (Wistrand) first 10/8

Fremont County
++++Valco Ponds, Canon City
Black Phoebe (Joel Adams) last 10/7

La Plata County
++++Pastorius Reservoir
Cassin's Vireo (James Beatty/Susan Allerton) (first 9/25) last 10/8
Pectoral Sandpiper (Allerton) last 10/8
++++Wildcat Canyon (Rafter J)
Acorn Woodpecker (2) (Steve Frohock) last 10/5

Mesa County
++++Grand Junction Wildlife Area
Gray Flycatcher (Carol Ortenzio:David Price) first 10/9
Sage Thrasher (Henwood:Moffatt) first 10/5
++++Connected Lakes State Park Area
Chestnut-sided Warbler (Carol Ortenzio/Adam Cupito) (first 10/8) last 10/9
Nashville Warbler (Adam Cupito) (first 10/2) last 10/9
Townsend's Warbler (Adam Cupito) (first 9/19) 2; last 10/9
++++Whitewater Gravel Ponds
Common Loon (Betty Fenton) first 10/7

Montrose County
++++Nucla Sewer Ponds
Townsend's Warbler (Dexter:Wright) first 10/8
Cassin's Vireo (Coen Dexter:Brenda Wright) first 10/7

Park County
++++Spinney Mountain
Semipalmated Plover (4) (David Tonnessen:Jim Merritt) first 10/7
Lesser Black-backed Gull (Tonnessen:Merritt) first 10/7
Sage Thrasher (Stevens/Tonnesse:Merritt) first (first 10/2) last 10/7
Northern Mockingbird (Tonnessen:Merritt) first 10/7

Rio Grande County
++++Monte Vista National Wildlife Refuge
Sage Thrasher (Glenn Gade) first 10/8

Teller County
++++Manitou Lake
Lewis's Woodpecker (Scott Chalmers/Tonnessen:Merritt) (first 10/1) last

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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