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Bird Observations

			Date Range: Nov, 1900-2020

Boulder

Updated ~30 hr(s) ago.

256 species (+89 other taxa)	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Snow Goose
Ross's Goose
Snow x Ross's Goose (hybrid)
Snow/Ross's Goose
Graylag Goose
Greater White-fronted Goose
Brant
Cackling Goose
Snow x Cackling Goose (hybrid)
Ross's x Cackling Goose (hybrid)
Greater White-fronted x Cackling Goose (hybrid)
Canada Goose
Graylag x Canada Goose (hybrid)
Snow x Canada Goose (hybrid)
Cackling/Canada Goose
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Snow/Ross's x Cackling/Canada Goose (hybrid)
Mute Swan
Trumpeter Swan
Tundra Swan
Trumpeter/Tundra Swan
swan sp.
goose sp.
Wood Duck
Mandarin Duck
Blue-winged Teal
Northern Shoveler
Gadwall
American Wigeon
Eurasian/American Wigeon
Mallard
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Mexican Duck
Mallard x Mexican Duck (hybrid)
Mallard/Mexican Duck
Northern Pintail
Gadwall x Northern Pintail (hybrid)
Green-winged Teal
teal sp.
dabbling duck sp.
Canvasback
Redhead
Ring-necked Duck
Greater Scaup
Lesser Scaup
Ring-necked Duck x Lesser Scaup (hybrid)
Greater/Lesser Scaup
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Aythya sp.
Surf Scoter
White-winged Scoter
Black Scoter
scoter sp.
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.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Ruddy Duck
duck sp.
Northern Bobwhite
Wild Turkey
Dusky Grouse
Ring-necked Pheasant
Indian Peafowl
Red Junglefowl
Chukar
Pied-billed Grebe
Horned Grebe
Red-necked Grebe
Eared Grebe
Horned/Eared Grebe
Podiceps sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Western Grebe
Clark's Grebe
Western x Clark's Grebe (hybrid)
Western/Clark's Grebe
grebe sp.
Rock Pigeon
Band-tailed Pigeon
Eurasian Collared-Dove
African Collared-Dove
Streptopelia sp.
Inca Dove
White-winged Dove
Mourning Dove
pigeon/dove sp.
Rivoli's Hummingbird
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Virginia Rail
Sora
American Coot
Sandhill Crane
American Avocet
Black-bellied Plover
American/Pacific Golden-Plover (Lesser Golden-Plover)
Killdeer
plover sp.
Long-billed Dowitcher
Short-billed/Long-billed Dowitcher
American Woodcock
Wilson's Snipe
Wilson's Phalarope
Red Phalarope
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Lesser Yellowlegs
Greater Yellowlegs
Lesser/Greater Yellowlegs
Sharp-tailed Sandpiper
Dunlin
Pectoral Sandpiper
peep sp.
shorebird sp.
Parasitic Jaeger
Ancient Murrelet
Little Gull
Black-legged Kittiwake
Sabine's Gull
Bonaparte's Gull
Franklin's Gull
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Short-billed Gull
Ring-billed Gull
Laughing x Ring-billed Gull (hybrid)
Herring Gull
Glaucous Gull
Lesser Black-backed Gull
California Gull
Iceland Gull
Herring/Iceland Gull
Larus sp.
gull sp.
Arctic Tern
Red-throated Loon
Pacific Loon
Common Loon
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Yellow-billed Loon
loon sp.
Double-crested Cormorant
American White Pelican
Brown Pelican
American Bittern
Black-crowned Night Heron
Snowy Egret
Western Cattle Egret
Great Egret
Great Blue Heron
Glossy/White-faced Ibis
Osprey
Golden Eagle
Northern Harrier
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sharp-shinned Hawk
Cooper's Hawk
Sharp-shinned/Cooper's Hawk
American Goshawk
Cooper's Hawk/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.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
eagle sp.
Barn Owl
Eastern Screech-Owl
Great Horned Owl
Northern Pygmy-Owl
Burrowing Owl
Spotted Owl
Long-eared Owl
Short-eared Owl
Boreal Owl
Northern Saw-whet Owl
owl sp.
Belted Kingfisher
Williamson's Sapsucker
Yellow-bellied Sapsucker
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Yellow-bellied/Red-naped Sapsucker
sapsucker sp.
Lewis's Woodpecker
Red-bellied Woodpecker
American Three-toed Woodpecker
Downy Woodpecker
Hairy Woodpecker
Downy/Hairy Woodpecker
Northern Flicker
woodpecker sp.
American Kestrel
Merlin
Peregrine Falcon
Prairie Falcon
large falcon sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
small falcon sp.
falcon sp.
diurnal raptor sp.
Yellow-bellied Flycatcher
Hammond's Flycatcher
Say's Phoebe
phoebe sp.
Vermilion Flycatcher
White-eyed Vireo
Red-eyed Vireo
Northern Shrike
Loggerhead/Northern Shrike
Canada Jay
Pinyon Jay
Steller's Jay
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Blue Jay
Woodhouse's Scrub-Jay
jay sp.
Black-billed Magpie
Clark's Nutcracker
American Crow
Chihuahuan Raven
Common Raven
raven sp.
crow/raven sp.
Black-capped Chickadee
Mountain Chickadee
Black-capped x Mountain Chickadee (hybrid)
Black-capped/Mountain Chickadee
chickadee sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Horned Lark
Barn 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
Blue-gray Gnatcatcher
Rock Wren
Canyon Wren
House Wren
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Pacific Wren
Winter Wren
Pacific/Winter Wren
Sedge Wren
Marsh Wren
Carolina Wren
wren sp.
American Dipper
European Starling
Gray Catbird
Brown Thrasher
Sage Thrasher
Northern Mockingbird
Eastern Bluebird
Western Bluebird
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Mountain Bluebird
bluebird sp.
Townsend's Solitaire
Varied Thrush
Hermit Thrush
Wood Thrush
American Robin
Bohemian Waxwing
Cedar Waxwing
Bohemian/Cedar Waxwing
House Sparrow
American Pipit
Evening Grosbeak
Pine Grosbeak
Gray-crowned Rosy-Finch
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Black Rosy-Finch
Brown-capped Rosy-Finch
rosy-finch sp.
House Finch
Purple Finch
Cassin's Finch
Haemorhous sp.
Common Redpoll
Common/Hoary Redpoll
Red Crossbill
White-winged Crossbill
European Goldfinch
Pine Siskin
Lesser Goldfinch
American Goldfinch
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
new world goldfinch sp.
finch sp.
Lapland Longspur
Grasshopper Sparrow
Chipping Sparrow
Field Sparrow
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.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Savannah Sparrow
Song Sparrow
Lincoln's Sparrow
Swamp Sparrow
Green-tailed Towhee
Spotted Towhee
Eastern Towhee
new world sparrow sp.
Yellow-headed Blackbird
Western Meadowlark
Sturnella meadowlark sp.
Red-winged Blackbird
Brown-headed Cowbird
Rusty Blackbird
Brewer's Blackbird
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Common Grackle
Great-tailed Grackle
blackbird sp.
Ovenbird
Northern Waterthrush
Black-and-white Warbler
Tennessee Warbler
Nashville Warbler
Common Yellowthroat
Hooded Warbler
Cape May Warbler
Northern Parula
Bay-breasted Warbler
Blackburnian Warbler
Chestnut-sided Warbler
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Blackpoll Warbler
Black-throated Blue Warbler
Palm Warbler
Pine Warbler
Yellow-rumped Warbler
Yellow-throated Warbler
Black-throated Gray Warbler
Townsend's Warbler
Black-throated Green Warbler
new world warbler sp.
Northern Cardinal
Rose-breasted Grosbeak
Indigo Bunting
passerine sp.
bird sp.

KEY:| = insufficient data | = rare to widespread

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