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Bird Observations

			Date Range: Apr, 1900-2022

Boulder Reservoir complex--Boulder Reservoir

Updated ~33 hr(s) ago.

150 species (+38 other taxa)	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Snow Goose
Ross's Goose
Canada Goose
Cackling/Canada Goose
goose sp.
Wood Duck
Blue-winged Teal
Cinnamon Teal
Blue-winged/Cinnamon Teal
Northern Shoveler
Gadwall
American Wigeon
Mallard
Mexican Duck
Mallard x Mexican Duck (hybrid)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Northern Pintail
Green-winged Teal
dabbling duck sp.
Canvasback
Redhead
Ring-necked Duck
Greater Scaup
Lesser Scaup
Greater/Lesser Scaup
Aythya sp.
White-winged Scoter
Long-tailed Duck
Bufflehead
Common Goldeneye
Hooded Merganser
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Common Merganser
Red-breasted Merganser
Common/Red-breasted Merganser
merganser sp.
Ruddy Duck
duck sp.
Ring-necked Pheasant
Pied-billed Grebe
Horned Grebe
Eared Grebe
Horned/Eared Grebe
Western Grebe
Clark's Grebe
Western/Clark's Grebe
grebe sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Rock Pigeon
Eurasian Collared-Dove
Mourning Dove
Virginia Rail
American Coot
Sandhill Crane
Black-necked Stilt
American Avocet
Killdeer
Semipalmated Plover
Mountain Plover
Whimbrel
Long-billed Curlew
Marbled Godwit
Long-billed Dowitcher
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Short-billed/Long-billed Dowitcher
Wilson's Snipe
Wilson's Phalarope
Spotted Sandpiper
Solitary Sandpiper
Lesser Yellowlegs
Willet
Greater Yellowlegs
Lesser/Greater Yellowlegs
Baird's Sandpiper
Least Sandpiper
Western Sandpiper
Semipalmated Sandpiper
peep sp.
shorebird sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Bonaparte's Gull
Franklin's Gull
Ring-billed Gull
Herring Gull
California Gull
Larus sp.
gull sp.
Caspian Tern
Forster's Tern
Common Loon
Double-crested Cormorant
American White Pelican
American Bittern
Snowy Egret
Green Heron
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Great Egret
Great Blue Heron
Glossy Ibis
White-faced Ibis
Glossy x White-faced Ibis (hybrid)
Glossy/White-faced Ibis
Turkey Vulture
Osprey
Golden Eagle
Northern Harrier
Sharp-shinned Hawk
Cooper's Hawk
Cooper's Hawk/American Goshawk
Bald Eagle
Broad-winged Hawk
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Swainson's Hawk
Red-tailed Hawk
Buteo sp.
hawk sp.
Barn Owl
Great Horned Owl
Short-eared Owl
Belted Kingfisher
Downy Woodpecker
Northern Flicker
woodpecker sp.
American Kestrel
Merlin
Peregrine Falcon
Prairie Falcon
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
small falcon sp.
falcon sp.
Eastern Phoebe
Say's Phoebe
Loggerhead Shrike
Steller's Jay
Blue Jay
Black-billed Magpie
American Crow
Common Raven
raven sp.
crow/raven sp.
Black-capped Chickadee
Horned Lark
Bank Swallow
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Tree Swallow
Violet-green Swallow
Tree/Violet-green Swallow
Northern Rough-winged Swallow
Barn Swallow
Cliff Swallow
swallow sp.
Bushtit
White-breasted Nuthatch
Blue-gray Gnatcatcher
House Wren
Sedge Wren
Marsh Wren
Sedge/Marsh Wren
European Starling
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sage Thrasher
Northern Mockingbird
Western Bluebird
Mountain Bluebird
bluebird sp.
Townsend's Solitaire
Hermit Thrush
American Robin
House Sparrow
American Pipit
House Finch
American Goldfinch
Chipping Sparrow
Brewer's Sparrow
Spizella sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
American Tree Sparrow
White-crowned Sparrow
Sagebrush Sparrow
Vesper Sparrow
Savannah Sparrow
Song Sparrow
Lincoln's Sparrow
Spotted Towhee
new world sparrow sp.
Yellow-headed Blackbird
Western Meadowlark
Red-winged Blackbird
Brown-headed Cowbird
Rusty Blackbird
Brewer's Blackbird
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Rusty/Brewer's Blackbird
Common Grackle
Great-tailed Grackle
blackbird sp.
Orange-crowned Warbler
Common Yellowthroat
Yellow-rumped Warbler
passerine sp.

KEY:| = insufficient data | = rare to widespread

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