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Bird Observations

			Date Range: Sep, 1900-2020

Boulder

Updated ~34 hr(s) ago.

303 species (+114 other taxa)	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Snow Goose
Graylag Goose
Swan Goose
Graylag x Swan Goose (hybrid)
Cackling Goose
Canada Goose
Snow x Canada Goose (hybrid)
Cackling/Canada Goose
Mute Swan
goose sp.
Wood Duck
Mandarin Duck
Blue-winged Teal
Cinnamon Teal
Blue-winged/Cinnamon Teal
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Northern Shoveler
Gadwall
American Wigeon
Mallard
Muscovy Duck x Mallard (hybrid)
Mallard/Mexican Duck
Northern Pintail
Green-winged Teal
teal sp.
dabbling duck sp.
Canvasback
Redhead
Ring-necked Duck
Greater Scaup
Lesser Scaup
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Greater/Lesser Scaup
Aythya sp.
Bufflehead
Hooded Merganser
Common Merganser
Common/Red-breasted Merganser
merganser sp.
Ruddy Duck
duck sp.
Northern Bobwhite
Wild Turkey
Dusky Grouse
White-tailed Ptarmigan
Ring-necked Pheasant
Indian Peafowl
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Red Junglefowl
Chukar
Pied-billed Grebe
Horned Grebe
Red-necked Grebe
Eared Grebe
Horned/Eared Grebe
Western Grebe
Clark's Grebe
Western x Clark's Grebe (hybrid)
Western/Clark's Grebe
grebe sp.
Rock Pigeon
Band-tailed Pigeon
Patagioenas sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Eurasian Collared-Dove
African Collared-Dove
Streptopelia sp.
White-winged Dove
Mourning Dove
pigeon/dove sp.
Common Nighthawk
Common Poorwill
Black Swift
Chimney Swift
Chimney/Vaux's Swift
White-throated Swift
swift sp.
Ruby-throated Hummingbird
Black-chinned Hummingbird
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Ruby-throated/Black-chinned Hummingbird
Calliope Hummingbird
Rufous Hummingbird
Broad-tailed Hummingbird
Selasphorus sp.
hummingbird sp.
Virginia Rail
Sora
American Coot
rail/crake sp.
Sandhill Crane
Black-necked Stilt
American Avocet
Black-bellied Plover
American Golden-Plover
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Black-bellied Plover/golden-plover sp.
Killdeer
Semipalmated Plover
Upland Sandpiper
Long-billed Curlew
Marbled Godwit
Short-billed Dowitcher
Long-billed Dowitcher
Short-billed/Long-billed Dowitcher
Wilson's Snipe
Wilson's Phalarope
Red Phalarope
Red-necked Phalarope
Red/Red-necked Phalarope
phalarope sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Spotted Sandpiper
Solitary Sandpiper
Lesser Yellowlegs
Willet
Greater Yellowlegs
Lesser/Greater Yellowlegs
Tringa sp.
Stilt Sandpiper
Sanderling
Baird's Sandpiper
Least Sandpiper
Pectoral Sandpiper
Western Sandpiper
Semipalmated Sandpiper
Western/Semipalmated Sandpiper
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
peep sp.
Calidris sp.
large shorebird sp.
shorebird sp.
Long-tailed Jaeger
jaeger sp.
Sabine's Gull
Bonaparte's Gull
Franklin's Gull
Ring-billed Gull
Herring Gull
Lesser Black-backed Gull
California Gull
Larus sp.
gull sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Least Tern
Caspian Tern
Black Tern
Forster's Tern
Arctic Tern
Common Tern
Common/Arctic Tern
Sterna sp.
tern sp.
Pacific Loon
Common Loon
Double-crested Cormorant
Double-crested/Neotropic Cormorant
American White Pelican
Brown Pelican
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
American Bittern
Black-crowned Night Heron
Little Blue Heron
Snowy Egret
Green Heron
Western Cattle Egret
Great Egret
Great Blue Heron
heron sp.
white egret sp.
White-faced Ibis
Glossy/White-faced Ibis
Turkey Vulture
Osprey
Golden Eagle
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Northern Harrier
Sharp-shinned Hawk
Cooper's Hawk
Sharp-shinned/Cooper's Hawk
American Goshawk
Accipiter sp.
Bald Eagle
Golden/Bald Eagle
Red-shouldered Hawk
Broad-winged Hawk
Swainson's Hawk
Red-tailed Hawk
Ferruginous Hawk
Buteo sp.
Buteo/eagle sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
hawk sp.
eagle sp.
Barn Owl
Flammulated Owl
Eastern Screech-Owl
Great Horned Owl
Northern Pygmy-Owl
Burrowing Owl
Long-eared Owl
Northern Saw-whet Owl
owl sp.
Belted Kingfisher
Williamson's Sapsucker
Red-naped Sapsucker
Yellow-bellied/Red-naped Sapsucker
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
sapsucker sp.
Lewis's Woodpecker
Red-headed Woodpecker
American Three-toed Woodpecker
Downy Woodpecker
Hairy Woodpecker
Downy x Hairy Woodpecker (hybrid)
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.
Budgerigar
Olive-sided Flycatcher
Western Wood-Pewee
Western/Eastern Wood-Pewee
pewee sp. (Contopus sp.)
Willow Flycatcher
Least Flycatcher
Hammond's Flycatcher
Gray Flycatcher
Dusky Flycatcher
Hammond's/Dusky Flycatcher
Gray/Dusky Flycatcher
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Western Flycatcher
Empidonax sp.
Black Phoebe
Eastern Phoebe
Black x Eastern Phoebe (hybrid)
Say's Phoebe
phoebe sp.
Vermilion Flycatcher
Ash-throated Flycatcher
Cassin's Kingbird
Western Kingbird
Cassin's/Western Kingbird
yellow-bellied kingbird sp.
Eastern Kingbird
new world flycatcher sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cassin's Vireo
Blue-headed Vireo
Plumbeous Vireo
Cassin's/Plumbeous Vireo
solitary vireo sp.
Philadelphia Vireo
Warbling Vireo
Red-eyed Vireo
vireo sp.
Loggerhead Shrike
Loggerhead/Northern Shrike
Canada Jay
Pinyon Jay
Steller's Jay
Blue Jay
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Woodhouse's Scrub-Jay
Black-billed Magpie
Clark's Nutcracker
American Crow
Common Raven
raven sp.
crow/raven sp.
Black-capped Chickadee
Mountain Chickadee
Black-capped x Mountain Chickadee (hybrid)
Black-capped/Mountain Chickadee
chickadee sp.
Horned Lark
Bank Swallow
Tree Swallow
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Violet-green Swallow
Tree/Violet-green Swallow
Northern Rough-winged Swallow
Barn Swallow
Cliff Swallow
swallow sp.
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
Blue-gray Gnatcatcher
Rock Wren
Canyon Wren
House Wren
Winter Wren
Pacific/Winter Wren
Marsh Wren
Carolina Wren
Bewick's Wren
wren sp.
American Dipper
European Starling
Gray Catbird
Brown Thrasher
Sage Thrasher
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Northern Mockingbird
Eastern Bluebird
Western Bluebird
Mountain Bluebird
bluebird sp.
Townsend's Solitaire
Swainson's Thrush
Hermit Thrush
Catharus sp.
American Robin
thrush sp.
Cedar Waxwing
House Sparrow
American Pipit
Sprague's Pipit
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Evening Grosbeak
Pine Grosbeak
Brown-capped Rosy-Finch
House Finch
Purple Finch
Cassin's Finch
Red Crossbill
White-winged Crossbill
Pine Siskin
Lesser Goldfinch
American Goldfinch
new world goldfinch sp.
finch sp.
Lapland Longspur
Chestnut-collared Longspur
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Thick-billed Longspur
longspur sp.
Cassin's Sparrow
Grasshopper Sparrow
Chipping Sparrow
Clay-colored Sparrow
Field Sparrow
Brewer's Sparrow
Spizella sp.
Black-throated Sparrow
Lark Sparrow
Lark Bunting
Spizella sp./American Tree Sparrow
Fox Sparrow
Dark-eyed Junco
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
White-crowned Sparrow
White-throated Sparrow
Zonotrichia sp.
Vesper Sparrow
Ammospiza sp.
Savannah Sparrow
Baird's Sparrow
Song Sparrow
Lincoln's Sparrow
Swamp Sparrow
Green-tailed Towhee
Spotted Towhee
Eastern Towhee
towhee sp.
new world sparrow sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Yellow-breasted Chat
Yellow-headed Blackbird
Bobolink
Western Meadowlark
Chihuahuan Meadowlark
Sturnella meadowlark sp.
Orchard Oriole
Bullock's Oriole
Red-winged Blackbird
Brown-headed Cowbird
Brewer's Blackbird
Rusty/Brewer's Blackbird
Common Grackle
Great-tailed Grackle
grackle sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
blackbird sp.
Ovenbird
Northern Waterthrush
Golden-winged Warbler
Black-and-white Warbler
Prothonotary Warbler
Tennessee Warbler
Orange-crowned Warbler
Nashville Warbler
Virginia's Warbler
MacGillivray's Warbler
Mourning Warbler
Common Yellowthroat
Hooded Warbler
American Redstart
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Northern Parula
Magnolia Warbler
Blackburnian Warbler
Yellow Warbler
Chestnut-sided Warbler
Blackpoll Warbler
Black-throated Blue Warbler
Palm Warbler
Yellow-rumped Warbler
Grace's Warbler
Black-throated Gray Warbler
Townsend's Warbler
Townsend's x Black-throated Green Warbler (hybrid)
Setophaga sp.
Wilson's Warbler
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
new world warbler sp.
Western Tanager
tanager sp. (Piranga sp.)
Rose-breasted Grosbeak
Black-headed Grosbeak
Rose-breasted/Black-headed Grosbeak
Blue Grosbeak
Lazuli Bunting
Indigo Bunting
Lazuli/Indigo Bunting
passerine sp.
bird sp.

KEY:| = insufficient data | = rare to widespread

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