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Bird Observations

			Date Range: Feb, 1900-2023

Boulder

Updated ~38 hr(s) ago.

193 species (+85 other taxa)	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Snow Goose
Ross's Goose
Snow/Ross's Goose
Graylag Goose
Greater White-fronted Goose
Domestic goose sp. (Domestic type)
Cackling Goose
Snow x Cackling Goose (hybrid)
Ross's x Cackling Goose (hybrid)
Canada Goose
Snow x Canada Goose (hybrid)
Cackling/Canada Goose
Snow/Ross's x Cackling/Canada Goose (hybrid)
Mute Swan
Trumpeter Swan
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Tundra Swan
Trumpeter/Tundra Swan
swan sp.
goose sp.
Wood Duck
Blue-winged Teal
Cinnamon Teal
Blue-winged x Cinnamon Teal (hybrid)
Blue-winged/Cinnamon Teal
Northern Shoveler
Gadwall
American Wigeon
Mallard
Muscovy Duck x Mallard (hybrid)
Mexican Duck
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Mallard x Mexican Duck (hybrid)
Mallard/Mexican Duck
Mallard x Mottled Duck (hybrid)
Northern Pintail
Green-winged Teal
American Wigeon x Green-winged Teal (hybrid)
Anas sp.
teal sp.
dabbling duck sp.
Canvasback
Redhead
Canvasback x Redhead (hybrid)
Ring-necked Duck
Greater Scaup
Lesser Scaup
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Ring-necked Duck x Lesser Scaup (hybrid)
Greater/Lesser Scaup
Aythya sp.
White-winged Scoter
Long-tailed Duck
Bufflehead
Common Goldeneye
Barrow's Goldeneye
Common/Barrow's Goldeneye
Hooded Merganser
Common Merganser
Red-breasted Merganser
Common/Red-breasted Merganser
merganser sp.
Ruddy Duck
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
duck sp.
Wild Turkey
Dusky Grouse
White-tailed Ptarmigan
Ring-necked Pheasant
Indian Peafowl
Red Junglefowl
Chukar
Pied-billed Grebe
Horned Grebe
Red-necked Grebe
Eared Grebe
Horned/Eared Grebe
Western Grebe
Clark's Grebe
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Western/Clark's Grebe
grebe sp.
Rock Pigeon
Band-tailed Pigeon
Eurasian Collared-Dove
African Collared-Dove
Streptopelia sp.
White-winged Dove
Mourning Dove
pigeon/dove sp.
Virginia Rail
American Coot
Sandhill Crane
Killdeer
Wilson's Snipe
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Red-necked Phalarope
Greater Yellowlegs
Lesser/Greater Yellowlegs
Dunlin
Franklin's Gull
Short-billed Gull
Ring-billed Gull
Herring Gull
Great Black-backed Gull
Glaucous Gull
Herring x Glaucous Gull (hybrid)
Lesser Black-backed Gull
California Gull
Glaucous-winged Gull
Herring x Glaucous-winged Gull (hybrid)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Iceland Gull
Herring/Iceland Gull
Larus sp.
gull sp.
Common Loon
Double-crested Cormorant
American White Pelican
Black-crowned Night Heron
Great Blue Heron
Turkey Vulture
Golden Eagle
Northern Harrier
Sharp-shinned Hawk
Cooper's Hawk
Sharp-shinned/Cooper's Hawk
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
American Goshawk
Accipiter sp.
Bald Eagle
Golden/Bald Eagle
Red-shouldered Hawk
Red-tailed Hawk
Rough-legged Hawk
Ferruginous Hawk
Buteo sp.
Buteo/eagle sp.
hawk sp.
eagle sp.
Barn Owl
Eastern Screech-Owl
Snowy Owl
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Great Horned Owl
Northern Pygmy-Owl
Long-eared Owl
Short-eared Owl
Boreal Owl
Northern Saw-whet Owl
owl sp.
Belted Kingfisher
Williamson's Sapsucker
Yellow-bellied Sapsucker
Red-naped Sapsucker
Lewis's Woodpecker
Red-headed Woodpecker
Red-bellied Woodpecker
American Three-toed Woodpecker
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Downy Woodpecker
Hairy Woodpecker
Downy/Hairy Woodpecker
Northern Flicker
woodpecker sp.
American Kestrel
Merlin
Gyrfalcon
Peregrine Falcon
Prairie Falcon
large falcon sp.
small falcon sp.
falcon sp.
diurnal raptor sp.
Say's Phoebe
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Northern Shrike
Loggerhead/Northern Shrike
shrike sp.
Canada Jay
Pinyon Jay
Steller's Jay
Blue Jay
Woodhouse's Scrub-Jay
jay sp.
Black-billed Magpie
Clark's Nutcracker
American Crow
Common Raven
raven sp.
crow/raven sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Black-capped Chickadee
Mountain Chickadee
Black-capped/Mountain Chickadee
chickadee sp.
Horned Lark
Tree Swallow
Bushtit
Ruby-crowned Kinglet
Golden-crowned Kinglet
Ruby-crowned/Golden-crowned Kinglet
White-breasted Nuthatch
Pygmy Nuthatch
Red-breasted Nuthatch
nuthatch sp.
Brown Creeper
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Canyon Wren
Winter Wren
Pacific/Winter Wren
Marsh Wren
Carolina Wren
wren sp.
American Dipper
European Starling
Gray Catbird
Brown Thrasher
Northern Mockingbird
Eastern Bluebird
Western Bluebird
Mountain Bluebird
bluebird sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Townsend's Solitaire
Varied Thrush
Hermit Thrush
American Robin
Bohemian Waxwing
Cedar Waxwing
Bohemian/Cedar Waxwing
House Sparrow
American Pipit
Evening Grosbeak
Pine Grosbeak
Gray-crowned Rosy-Finch
Black Rosy-Finch
Brown-capped Rosy-Finch
rosy-finch sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
House Finch
Purple Finch
House/Purple Finch
Cassin's Finch
Haemorhous sp.
Common Redpoll
Red Crossbill
White-winged Crossbill
crossbill sp.
European Goldfinch
Pine Siskin
Lesser Goldfinch
American Goldfinch
new world goldfinch sp.
finch sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Lapland Longspur
American Tree Sparrow
Spizella sp./American Tree Sparrow
Fox Sparrow
Dark-eyed Junco
White-crowned Sparrow
Golden-crowned Sparrow
Harris's Sparrow
White-throated Sparrow
Zonotrichia sp.
Savannah Sparrow
Song Sparrow
Swamp Sparrow
Spotted Towhee
Spotted x Eastern Towhee (hybrid)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Spotted/Eastern Towhee (Rufous-sided Towhee)
towhee sp.
new world sparrow sp.
Yellow-headed Blackbird
Western Meadowlark
Sturnella meadowlark sp.
Red-winged Blackbird
Brown-headed Cowbird
Rusty Blackbird
Brewer's Blackbird
Rusty/Brewer's Blackbird
Common Grackle
Great-tailed Grackle
grackle sp.
blackbird sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cape May Warbler
Pine Warbler
Yellow-rumped Warbler
new world warbler sp.
Scarlet Tanager
Northern Cardinal
passerine sp.
bird sp.

KEY:| = insufficient data | = rare to widespread

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