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Bird Observations

Date Range:
Jan-Dec, 1900-2021

Colorado

Updated ~28 hr(s) ago.

540 species (+309 other taxa) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Snow x Ross's Goose (hybrid)
Snow/Ross's Goose
Graylag x Swan Goose (hybrid)
Snow x Greater White-fronted Goose (hybrid)
Domestic goose sp. (Domestic type)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Snow x Cackling Goose (hybrid)
Ross's x Cackling Goose (hybrid)
Greater White-fronted x Cackling Goose (hybrid)
Barnacle x Cackling Goose (hybrid)
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)
Snow x Canada Goose (hybrid)
Ross's x Canada Goose (hybrid)
Cackling/Canada Goose
Snow/Ross's x Cackling/Canada Goose (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Branta sp.
Trumpeter/Tundra Swan
swan sp.
goose sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Blue-winged x Cinnamon Teal (hybrid)
Blue-winged/Cinnamon Teal
Blue-winged Teal x Northern Shoveler (hybrid)
Cinnamon Teal x Northern Shoveler (hybrid)
Northern Shoveler x Gadwall (hybrid)
Northern Shoveler x American Wigeon (hybrid)
Gadwall x American Wigeon (hybrid)
Eurasian x American Wigeon (hybrid)
Eurasian/American Wigeon
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Muscovy Duck x Mallard (hybrid)
Northern Shoveler x Mallard (hybrid)
Gadwall x Mallard (hybrid)
American Wigeon x Mallard (hybrid)
Mallard x Mexican Duck (hybrid)
Mallard/Mexican Duck
Mallard x American Black Duck (hybrid)
Mallard/American Black Duck
Mallard x Mottled Duck (hybrid)
Mallard x Mexican/Mottled Duck (hybrid)
Mallard/Mottled Duck
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mexican/Mottled Duck
Gadwall x Northern Pintail (hybrid)
American Wigeon x Northern Pintail (hybrid)
Mallard x Northern Pintail (hybrid)
Blue-winged x Green-winged Teal (hybrid)
Cinnamon x Green-winged Teal (hybrid)
Gadwall x Green-winged Teal (hybrid)
American Wigeon x Green-winged Teal (hybrid)
Anas sp.
teal sp.
dabbling duck sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Canvasback x Redhead (hybrid)
Redhead x Ring-necked Duck (hybrid)
Ring-necked x Tufted Duck (hybrid)
Redhead x Greater Scaup (hybrid)
Ring-necked Duck x Greater Scaup (hybrid)
Redhead x Lesser Scaup (hybrid)
Ring-necked Duck x Lesser Scaup (hybrid)
Tufted Duck x Lesser Scaup (hybrid)
Redhead x scaup sp. (hybrid)
Ring-necked Duck x scaup sp. (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Greater/Lesser Scaup
Aythya sp.
Surf/Black Scoter
scoter sp.
Bufflehead x Common Goldeneye (hybrid)
Common x Barrow's Goldeneye (hybrid)
Common/Barrow's Goldeneye
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Bufflehead x Hooded Merganser (hybrid)
Common Goldeneye x Hooded Merganser (hybrid)
goldeneye sp. x Hooded Merganser (hybrid)
Common/Red-breasted Merganser
merganser sp.
duck sp.
waterfowl sp.
Northern Bobwhite x Scaled Quail (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Greater/Lesser Prairie-Chicken
grouse sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
pheasant sp.
Horned/Eared Grebe
Podiceps sp.
Western x Clark's Grebe (hybrid)
Western/Clark's Grebe
grebe sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Rock/Band-tailed Pigeon
Patagioenas sp.
Eurasian/African Collared-Dove
Streptopelia sp.
Eurasian Collared-Dove x Mourning Dove (hybrid)
pigeon/dove sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Yellow-billed/Black-billed Cuckoo
cuckoo sp. (Cuculidae sp.)
nighthawk sp.
Eastern/Mexican Whip-poor-will
nightjar sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Chimney/Vaux's Swift
Chaetura sp.
large swift sp.
swift sp.
Ruby-throated x Black-chinned Hummingbird (hybrid)
Ruby-throated/Black-chinned Hummingbird
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Rufous/Allen's Hummingbird
Rufous x Broad-tailed Hummingbird (hybrid)
Selasphorus sp.
hummingbird sp.
Rallus sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
rail/crake sp.
crane sp.
American/Pacific Golden-Plover (Lesser Golden-Plover)
golden-plover sp.
Black-bellied Plover/golden-plover sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
small plover sp.
plover sp.
godwit sp.
Short-billed/Long-billed Dowitcher
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Red/Red-necked Phalarope
phalarope sp.
Lesser/Greater Yellowlegs
Tringa sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Western/Semipalmated Sandpiper
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
peep sp.
Calidris sp.
Scolopacidae sp.
large shorebird sp.
shorebird sp.
Long-tailed/Parasitic Jaeger
Parasitic/Pomarine Jaeger
jaeger sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Laughing x Ring-billed Gull (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Herring x Glaucous Gull (hybrid)
Herring x Lesser Black-backed Gull (hybrid)
Herring x California Gull (hybrid)
Western x Glaucous-winged Gull (hybrid)
Herring x Glaucous-winged Gull (hybrid)
Glaucous x Glaucous-winged Gull (hybrid)
Herring/Glaucous-winged Gull
Herring/Iceland Gull
white-winged gull sp.
Larus sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
gull sp.
Forster's/Common Tern
Common/Arctic Tern
Sterna sp.
large tern sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
tern sp.
gull/tern sp.
Arctic/Pacific Loon
Common/Yellow-billed Loon
loon sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Double-crested x Neotropic Cormorant (hybrid)
Double-crested/Neotropic Cormorant
cormorant sp.
Yellow-crowned/Black-crowned Night Heron
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
heron sp.
white egret sp.
Glossy x White-faced Ibis (hybrid)
Glossy/White-faced Ibis
ibis sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hen/Northern Harrier
Sharp-shinned/Cooper's Hawk
Cooper's Hawk/American Goshawk
Accipiter sp.
Golden/Bald Eagle
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Red-tailed x Ferruginous Hawk (hybrid)
Buteo sp.
Buteo/eagle sp.
hawk sp.
eagle sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Western x Eastern Screech-Owl (hybrid)
screech-owl sp.
Long-eared/Short-eared Owl
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Boreal/Northern Saw-whet Owl
owl sp.
Yellow-bellied x Red-naped Sapsucker (hybrid)
Yellow-bellied/Red-naped Sapsucker
Yellow-bellied x Red-breasted Sapsucker (hybrid)
Red-naped x Red-breasted Sapsucker (hybrid)
Red-naped/Red-breasted Sapsucker
sapsucker sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Downy/Ladder-backed Woodpecker
Downy x Hairy Woodpecker (hybrid)
Downy/Hairy Woodpecker
Dryobates sp.
Northern/Gilded Flicker
woodpecker sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
large falcon sp.
small falcon sp.
falcon sp.
diurnal raptor sp.
parakeet sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Western x Eastern Wood-Pewee (hybrid)
Western/Eastern Wood-Pewee
pewee sp. (Contopus sp.)
Alder/Willow Flycatcher (Traill's Flycatcher)
Hammond's/Dusky Flycatcher
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Gray/Dusky Flycatcher
Empidonax sp.
Black x Eastern Phoebe (hybrid)
Black x Say's Phoebe (hybrid)
phoebe sp.
Myiarchus sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Cassin's/Western Kingbird
yellow-bellied kingbird sp.
Western x Eastern Kingbird (hybrid)
Tyrannus sp.
new world flycatcher sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Cassin's/Blue-headed Vireo
Cassin's/Plumbeous Vireo
solitary vireo sp.
Philadelphia/Warbling Vireo
Warbling x Red-eyed Vireo (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Philadelphia/Red-eyed Vireo
vireo sp.
Loggerhead/Northern Shrike
Northern/Great Gray Shrike
shrike sp.
Steller's x Blue Jay (hybrid)
Steller's Jay x Woodhouse's Scrub-Jay (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
California/Woodhouse's Scrub-Jay
jay sp.
crow sp.
raven sp.
crow/raven sp.
Black-capped x Mountain Chickadee (hybrid)
Black-capped/Mountain Chickadee
chickadee sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Tree/Violet-green Swallow
Tachycineta sp.
Barn x Cliff Swallow (hybrid)
Cliff/Cave Swallow
swallow sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Ruby-crowned/Golden-crowned Kinglet
nuthatch sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Pacific/Winter Wren
Sedge/Marsh Wren
wren sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Brown/Long-billed Thrasher
Curve-billed/Bendire's Thrasher
Toxostoma sp.
mimid sp.
bluebird sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Catharus sp.
thrush sp.
Bohemian/Cedar Waxwing
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
pipit sp.
rosy-finch sp.
House/Purple Finch
Purple/Cassin's Finch
Haemorhous sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Common/Hoary Redpoll
crossbill sp.
new world goldfinch sp.
Spinus sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
finch sp.
longspur sp.
Chipping x Clay-colored Sparrow (hybrid)
Chipping x Field Sparrow (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Clay-colored x Brewer's Sparrow (hybrid)
Spizella sp.
Spizella sp./American Tree Sparrow
White-crowned x Golden-crowned Sparrow (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
White-crowned/White-throated Sparrow
Zonotrichia sp.
Ammospiza sp.
Grasshopper/Baird's Sparrow
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Lincoln's/Swamp Sparrow
Canyon x Spotted Towhee (hybrid)
Green-tailed x Spotted Towhee (hybrid)
Spotted x Eastern Towhee (hybrid)
Spotted/Eastern Towhee (Rufous-sided Towhee)
towhee sp.
new world sparrow sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Western x Eastern Meadowlark (hybrid)
Western/Eastern Meadowlark
Western/Chihuahuan Meadowlark
Eastern/Chihuahuan Meadowlark
Sturnella meadowlark sp.
Bullock's x Baltimore Oriole (hybrid)
Bullock's/Baltimore Oriole
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
new world oriole sp.
Bronzed/Brown-headed Cowbird
Rusty/Brewer's Blackbird
grackle sp.
blackbird sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Louisiana/Northern Waterthrush
Golden-winged x Blue-winged Warbler (hybrid)
Brewster's Warbler (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Leiothlypis sp.
MacGillivray's x Mourning Warbler (hybrid)
MacGillivray's/Mourning Warbler
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hooded x Yellow Warbler (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Townsend's x Hermit Warbler (hybrid)
Townsend's x Black-throated Green Warbler (hybrid)
Setophaga sp.
new world warbler sp.
Hepatic/Summer Tanager
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Summer/Scarlet Tanager
tanager sp. (Piranga sp.)
Northern Cardinal/Pyrrhuloxia
Rose-breasted x Black-headed Grosbeak (hybrid)
Rose-breasted/Black-headed Grosbeak
Pheucticus sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Lazuli x Indigo Bunting (hybrid)
Lazuli/Indigo Bunting
Passerina sp.
Sporophila sp.
passerine sp.
bird sp.

KEY:| = insufficient data | = rare to widespread

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