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Bird Observations

			Date Range: May, 1900-2021

Colorado

Updated ~34 hr(s) ago.

460 species (+200 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
Swan Goose
Graylag x Swan Goose (hybrid)
Greater White-fronted Goose
Domestic goose sp. (Domestic type)
Cackling Goose
Canada Goose
Swan Goose x Canada Goose (hybrid)
Greater White-fronted x Canada Goose (hybrid)
Graylag x Canada Goose (hybrid)
Domestic goose sp. x Canada Goose (hybrid)
Cackling/Canada Goose
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Mute Swan
Black Swan
Trumpeter Swan
Tundra Swan
Trumpeter/Tundra Swan
swan sp.
goose sp.
Muscovy Duck
Wood Duck
Mandarin Duck
Garganey
Blue-winged Teal
Cinnamon Teal
Blue-winged x Cinnamon Teal (hybrid)
Blue-winged/Cinnamon Teal
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Northern Shoveler
Blue-winged Teal x Northern Shoveler (hybrid)
Gadwall
Eurasian Wigeon
American Wigeon
Northern Shoveler x American Wigeon (hybrid)
Eurasian/American Wigeon
Mallard
Muscovy Duck x Mallard (hybrid)
Gadwall x Mallard (hybrid)
Mexican Duck
Mallard x Mexican Duck (hybrid)
Mallard/Mexican Duck
Mottled Duck
Northern Pintail
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Mallard x Northern Pintail (hybrid)
Green-winged Teal
teal sp.
dabbling duck sp.
Canvasback
Redhead
Canvasback x Redhead (hybrid)
Ring-necked Duck
Redhead x Ring-necked Duck (hybrid)
Greater Scaup
Lesser Scaup
Ring-necked Duck x Lesser Scaup (hybrid)
Greater/Lesser Scaup
Aythya sp.
Harlequin Duck
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Surf Scoter
White-winged Scoter
Long-tailed Duck
Bufflehead
Common Goldeneye
Barrow's Goldeneye
Common/Barrow's Goldeneye
Hooded Merganser
Bufflehead x Hooded Merganser (hybrid)
Common Merganser
Red-breasted Merganser
Common/Red-breasted Merganser
Ruddy Duck
duck sp.
waterfowl sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Helmeted Guineafowl
Northern Bobwhite
Scaled Quail
Northern Bobwhite x Scaled Quail (hybrid)
California Quail
Gambel's Quail
Wild Turkey
Greater Sage-Grouse
Gunnison Sage-Grouse
Dusky Grouse
Sharp-tailed Grouse
Greater Prairie-Chicken
Lesser Prairie-Chicken
White-tailed Ptarmigan
grouse sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
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
Western x Clark's Grebe (hybrid)
Western/Clark's Grebe
grebe sp.
Rock Pigeon
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Band-tailed Pigeon
Eurasian Collared-Dove
African Collared-Dove
Eurasian/African Collared-Dove
Streptopelia sp.
Inca Dove
Common Ground Dove
White-winged Dove
Mourning Dove
pigeon/dove sp.
Greater Roadrunner
Yellow-billed Cuckoo
Black-billed Cuckoo
Yellow-billed/Black-billed Cuckoo
Lesser Nighthawk
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Common Nighthawk
nighthawk sp.
Common Poorwill
Eastern Whip-poor-will
Mexican Whip-poor-will
Eastern/Mexican Whip-poor-will
Black Swift
Chimney Swift
Chimney/Vaux's Swift
Chaetura sp.
White-throated Swift
large swift sp.
swift sp.
Rivoli's Hummingbird
Ruby-throated Hummingbird
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Black-chinned Hummingbird
Ruby-throated/Black-chinned Hummingbird
Anna's Hummingbird
Costa's Hummingbird
Calliope Hummingbird
Rufous Hummingbird
Broad-tailed Hummingbird
Selasphorus sp.
hummingbird sp.
King Rail
Virginia Rail
Sora
Common Gallinule
American Coot
Black Rail
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
rail/crake sp.
Sandhill Crane
Whooping Crane
Black-necked Stilt
American Avocet
Black-bellied Plover
American Golden-Plover
American/Pacific Golden-Plover (Lesser Golden-Plover)
Black-bellied Plover/golden-plover sp.
Killdeer
Semipalmated Plover
Piping Plover
Mountain Plover
Snowy Plover
small plover sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
plover sp.
Upland Sandpiper
Whimbrel
Long-billed Curlew
Hudsonian Godwit
Marbled Godwit
godwit sp.
Short-billed Dowitcher
Long-billed Dowitcher
Short-billed/Long-billed Dowitcher
American Woodcock
Wilson's Snipe
Wilson's Phalarope
Red Phalarope
Red-necked Phalarope
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Red/Red-necked Phalarope
phalarope sp.
Spotted Sandpiper
Solitary Sandpiper
Lesser Yellowlegs
Willet
Greater Yellowlegs
Lesser/Greater Yellowlegs
Tringa sp.
Ruddy Turnstone
Red Knot
Ruff
Stilt Sandpiper
Buff-breasted Sandpiper
Sanderling
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Dunlin
Baird's Sandpiper
White-rumped Sandpiper
Least Sandpiper
Pectoral Sandpiper
Western Sandpiper
Semipalmated Sandpiper
Western/Semipalmated Sandpiper
peep sp.
Calidris sp.
Scolopacidae sp.
large shorebird sp.
shorebird sp.
Long-tailed Jaeger
Pomarine Jaeger
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Little Gull
Ross's Gull
Black-legged Kittiwake
Sabine's Gull
Bonaparte's Gull
Laughing Gull
Franklin's Gull
Ring-billed Gull
Western Gull
Herring Gull
Great Black-backed Gull
Lesser Black-backed Gull
California Gull
Glaucous-winged Gull
Herring/Glaucous-winged Gull
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Iceland Gull
Herring/Iceland Gull
Larus sp.
gull sp.
Least Tern
Caspian Tern
Black Tern
Forster's Tern
Arctic Tern
Common Tern
Forster's/Common Tern
Common/Arctic Tern
Sterna sp.
tern sp.
Red-throated Loon
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Pacific Loon
Arctic/Pacific Loon
Common Loon
Yellow-billed Loon
Common/Yellow-billed Loon
loon sp.
Anhinga
Double-crested Cormorant
Neotropic Cormorant
Double-crested/Neotropic Cormorant
cormorant sp.
American White Pelican
Brown Pelican
American Bittern
Least Bittern
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Yellow-crowned Night Heron
Black-crowned Night Heron
Yellow-crowned/Black-crowned Night Heron
Little Blue Heron
Tricolored Heron
Reddish Egret
Snowy Egret
Green Heron
Western Cattle Egret
Great Egret
Great Blue Heron
heron sp.
white egret sp.
White Ibis
Glossy Ibis
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
White-faced Ibis
Glossy x White-faced Ibis (hybrid)
Glossy/White-faced Ibis
ibis sp.
Black Vulture
Turkey Vulture
Osprey
White-tailed Kite
Swallow-tailed Kite
Golden Eagle
Mississippi Kite
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
Cooper's Hawk/American Goshawk
Accipiter sp.
Bald Eagle
Golden/Bald Eagle
Common Black Hawk
Variable Hawk
Red-shouldered Hawk
Broad-winged Hawk
Swainson's Hawk
Zone-tailed Hawk
Red-tailed Hawk
Rough-legged Hawk
Ferruginous Hawk
Buteo sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Buteo/eagle sp.
hawk sp.
eagle sp.
Barn Owl
Flammulated Owl
Western Screech-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
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
owl sp.
Belted Kingfisher
Williamson's Sapsucker
Yellow-bellied Sapsucker
Red-naped Sapsucker
Yellow-bellied x Red-naped Sapsucker (hybrid)
Yellow-bellied/Red-naped Sapsucker
sapsucker sp.
Lewis's Woodpecker
Red-headed Woodpecker
Acorn Woodpecker
Red-bellied Woodpecker
American Three-toed Woodpecker
Downy Woodpecker
Ladder-backed Woodpecker
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Hairy Woodpecker
Downy x Hairy Woodpecker (hybrid)
Downy/Hairy Woodpecker
Dryobates sp.
Northern Flicker
woodpecker sp.
American Kestrel
Merlin
Peregrine Falcon
Prairie Falcon
large falcon sp.
small falcon sp.
falcon sp.
diurnal raptor sp.
Budgerigar
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Monk Parakeet
Olive-sided Flycatcher
Western Wood-Pewee
Eastern Wood-Pewee
Western x Eastern Wood-Pewee (hybrid)
Western/Eastern Wood-Pewee
pewee sp. (Contopus sp.)
Yellow-bellied Flycatcher
Acadian Flycatcher
Alder Flycatcher
Willow Flycatcher
Alder/Willow Flycatcher (Traill's Flycatcher)
Least Flycatcher
Hammond's Flycatcher
Gray Flycatcher
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Dusky Flycatcher
Hammond's/Dusky Flycatcher
Gray/Dusky Flycatcher
Western Flycatcher
Buff-breasted Flycatcher
Empidonax sp.
Black Phoebe
Eastern Phoebe
Black x Eastern Phoebe (hybrid)
Say's Phoebe
phoebe sp.
Vermilion Flycatcher
Ash-throated Flycatcher
Great Crested Flycatcher
Myiarchus sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cassin's Kingbird
Western Kingbird
Cassin's/Western Kingbird
yellow-bellied kingbird sp.
Eastern Kingbird
Scissor-tailed Flycatcher
new world flycatcher sp.
White-eyed Vireo
Bell's Vireo
Gray Vireo
Yellow-throated Vireo
Cassin's Vireo
Blue-headed Vireo
Cassin's/Blue-headed Vireo
Plumbeous Vireo
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cassin's/Plumbeous Vireo
solitary vireo sp.
Philadelphia Vireo
Warbling Vireo
Philadelphia/Warbling Vireo
Red-eyed Vireo
Warbling x Red-eyed Vireo (hybrid)
Philadelphia/Red-eyed Vireo
vireo sp.
Loggerhead Shrike
Loggerhead/Northern Shrike
shrike sp.
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
Steller's Jay x Woodhouse's Scrub-Jay (hybrid)
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
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
chickadee sp.
Juniper Titmouse
Horned Lark
Bank Swallow
Tree Swallow
Violet-green Swallow
Tree/Violet-green Swallow
Tachycineta sp.
Purple Martin
Northern Rough-winged Swallow
Barn Swallow
Cliff Swallow
Cliff/Cave Swallow
swallow sp.
Bushtit
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
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
Winter Wren
Pacific/Winter Wren
Sedge Wren
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Marsh Wren
Sedge/Marsh Wren
Carolina Wren
Bewick's Wren
wren sp.
American Dipper
European Starling
Gray Catbird
Curve-billed Thrasher
Brown Thrasher
Curve-billed/Bendire's Thrasher
Toxostoma sp.
Sage Thrasher
Northern Mockingbird
mimid sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Eastern Bluebird
Western Bluebird
Mountain Bluebird
bluebird sp.
Townsend's Solitaire
Varied Thrush
Veery
Gray-cheeked Thrush
Swainson's Thrush
Hermit Thrush
Catharus sp.
Wood Thrush
American Robin
thrush sp.
Bohemian Waxwing
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cedar Waxwing
Bohemian/Cedar Waxwing
Phainopepla
House Sparrow
American Pipit
Sprague's Pipit
pipit sp.
Evening Grosbeak
Pine Grosbeak
Gray-crowned Rosy-Finch
Black Rosy-Finch
Brown-capped Rosy-Finch
rosy-finch sp.
House Finch
Purple Finch
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cassin's Finch
Purple/Cassin's Finch
Haemorhous sp.
Common Redpoll
Red Crossbill
White-winged Crossbill
crossbill sp.
Pine Siskin
Lesser Goldfinch
Lawrence's 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
Black-chinned Sparrow
Field Sparrow
Brewer's Sparrow
Clay-colored x Brewer's Sparrow (hybrid)
Spizella sp.
Black-throated Sparrow
Lark Sparrow
Lark Bunting
American Tree Sparrow
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Spizella sp./American Tree Sparrow
Fox Sparrow
Dark-eyed Junco
Rufous-collared Sparrow
White-crowned Sparrow
Golden-crowned Sparrow
Harris's Sparrow
White-throated Sparrow
Zonotrichia sp.
Sagebrush Sparrow
Vesper Sparrow
LeConte's Sparrow
Savannah Sparrow
Baird's Sparrow
Song Sparrow
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Lincoln's Sparrow
Swamp Sparrow
Lincoln's/Swamp Sparrow
Canyon Towhee
Rufous-crowned Sparrow
Green-tailed Towhee
Spotted Towhee
Canyon x Spotted Towhee (hybrid)
Green-tailed x Spotted Towhee (hybrid)
Eastern Towhee
Spotted x Eastern Towhee (hybrid)
Spotted/Eastern Towhee (Rufous-sided Towhee)
towhee sp.
new world sparrow sp.
Yellow-breasted Chat
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Yellow-headed Blackbird
Bobolink
Western Meadowlark
Eastern Meadowlark
Western/Eastern Meadowlark
Chihuahuan Meadowlark
Eastern/Chihuahuan Meadowlark
Sturnella meadowlark sp.
Orchard Oriole
Hooded Oriole
Bullock's Oriole
Baltimore Oriole
Bullock's x Baltimore Oriole (hybrid)
Bullock's/Baltimore Oriole
Scott's Oriole
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
new world oriole sp.
Red-winged Blackbird
Bronzed Cowbird
Brown-headed Cowbird
Rusty Blackbird
Brewer's Blackbird
Rusty/Brewer's Blackbird
Common Grackle
Great-tailed Grackle
grackle sp.
blackbird sp.
Ovenbird
Worm-eating Warbler
Louisiana Waterthrush
Northern Waterthrush
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Louisiana/Northern Waterthrush
Golden-winged Warbler
Blue-winged Warbler
Golden-winged x Blue-winged Warbler (hybrid)
Brewster's Warbler (hybrid)
Black-and-white Warbler
Prothonotary Warbler
Swainson's Warbler
Tennessee Warbler
Orange-crowned Warbler
Lucy's Warbler
Nashville Warbler
Virginia's Warbler
Leiothlypis sp.
Connecticut Warbler
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
MacGillivray's Warbler
Mourning Warbler
MacGillivray's x Mourning Warbler (hybrid)
MacGillivray's/Mourning Warbler
Kentucky Warbler
Common Yellowthroat
Hooded Warbler
American Redstart
Cape May Warbler
Cerulean Warbler
Northern Parula
Tropical Parula
Magnolia Warbler
Bay-breasted Warbler
Blackburnian Warbler
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Yellow Warbler
Hooded x Yellow Warbler (hybrid)
Chestnut-sided Warbler
Blackpoll Warbler
Black-throated Blue Warbler
Palm Warbler
Pine Warbler
Yellow-rumped Warbler
Yellow-throated Warbler
Prairie Warbler
Grace's Warbler
Black-throated Gray Warbler
Townsend's Warbler
Hermit Warbler
Black-throated Green Warbler
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Townsend's x Black-throated Green Warbler (hybrid)
Setophaga sp.
Golden-crowned Warbler
Canada Warbler
Wilson's Warbler
Red-faced Warbler
Painted Redstart
new world warbler sp.
Hepatic Tanager
Summer Tanager
Scarlet Tanager
Summer/Scarlet Tanager
Western Tanager
tanager sp. (Piranga sp.)
Northern Cardinal
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Yellow Grosbeak
Rose-breasted Grosbeak
Black-headed Grosbeak
Rose-breasted x Black-headed Grosbeak (hybrid)
Rose-breasted/Black-headed Grosbeak
Blue Grosbeak
Lazuli Bunting
Indigo Bunting
Lazuli x Indigo Bunting (hybrid)
Lazuli/Indigo Bunting
Painted Bunting
Passerina sp.
Dickcissel
passerine sp.
bird sp.

KEY:| = insufficient data | = rare to widespread

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