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Bird Observations

			Date Range: Jan-Dec, 1900-2017

Denver

Updated ~32 hr(s) ago.

316 species (+98 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
Graylag x Swan Goose (hybrid)
Greater White-fronted Goose
Domestic goose sp. (Domestic type)
Brant
Cackling Goose
Snow x Cackling Goose (hybrid)
Ross's x Cackling Goose (hybrid)
Greater White-fronted x Cackling Goose (hybrid)
Canada Goose
Greater White-fronted x Canada Goose (hybrid)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Graylag x Canada Goose (hybrid)
Snow x Canada Goose (hybrid)
Cackling/Canada Goose
Mute Swan
Tundra Swan
Trumpeter/Tundra Swan
goose sp.
Wood Duck
Blue-winged Teal
Cinnamon Teal
Blue-winged x Cinnamon Teal (hybrid)
Blue-winged/Cinnamon Teal
Northern Shoveler
Gadwall
American Wigeon
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Eurasian/American Wigeon
Mallard
Gadwall x Mallard (hybrid)
Mallard x Mexican Duck (hybrid)
Mallard/Mexican Duck
American Black Duck
Mallard x Mottled Duck (hybrid)
Northern Pintail
Green-winged Teal
teal sp.
dabbling duck sp.
Canvasback
Redhead
Ring-necked Duck
Greater Scaup
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Lesser Scaup
Greater/Lesser Scaup
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
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Common/Red-breasted Merganser
Ruddy Duck
duck sp.
Wild Turkey
Ring-necked Pheasant
Indian Peafowl
pheasant sp.
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
White-winged Dove
Mourning Dove
pigeon/dove sp.
Yellow-billed Cuckoo
Black-billed Cuckoo
Common Nighthawk
nighthawk sp.
Common Poorwill
Black Swift
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Chimney Swift
White-throated Swift
Black-chinned Hummingbird
Anna's Hummingbird
Calliope Hummingbird
Rufous Hummingbird
Broad-tailed Hummingbird
Selasphorus sp.
hummingbird sp.
Virginia Rail
Sora
American Coot
Sandhill Crane
Black-necked Stilt
American Avocet
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Black-bellied Plover
Killdeer
Semipalmated Plover
plover sp.
Whimbrel
Long-billed Curlew
Marbled Godwit
Long-billed Dowitcher
Short-billed/Long-billed Dowitcher
Wilson's Snipe
Wilson's Phalarope
Red-necked Phalarope
Red/Red-necked Phalarope
phalarope sp.
Spotted Sandpiper
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Solitary Sandpiper
Lesser Yellowlegs
Willet
Greater Yellowlegs
Lesser/Greater Yellowlegs
Tringa sp.
Ruddy Turnstone
Stilt Sandpiper
Sanderling
Dunlin
Baird's Sandpiper
White-rumped Sandpiper
Least Sandpiper
Pectoral Sandpiper
Western Sandpiper
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Semipalmated Sandpiper
peep sp.
large shorebird sp.
shorebird sp.
jaeger sp.
Little Gull
Sabine's Gull
Bonaparte's Gull
Laughing Gull
Franklin's Gull
Short-billed Gull
Ring-billed Gull
Herring Gull
Glaucous Gull
Lesser Black-backed Gull
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
California Gull
Iceland Gull
Larus sp.
gull sp.
Caspian Tern
Black Tern
Forster's Tern
Common Tern
Forster's/Common Tern
Red-throated Loon
Pacific Loon
Arctic/Pacific Loon
Common Loon
loon sp.
Double-crested Cormorant
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
American White Pelican
American Bittern
Yellow-crowned Night Heron
Black-crowned Night Heron
Yellow-crowned/Black-crowned Night Heron
Snowy Egret
Green Heron
Western Cattle Egret
Great Egret
Great Blue Heron
white egret sp.
White-faced Ibis
Glossy/White-faced Ibis
Turkey Vulture
Osprey
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Golden Eagle
Northern Harrier
Sharp-shinned Hawk
Cooper's Hawk
Sharp-shinned/Cooper's Hawk
American Goshawk
Accipiter sp.
Bald Eagle
Broad-winged Hawk
Swainson's Hawk
Red-tailed Hawk
Rough-legged 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
Eastern Screech-Owl
Snowy Owl
Great Horned Owl
Burrowing Owl
Long-eared Owl
Short-eared Owl
Northern Saw-whet Owl
owl sp.
Belted Kingfisher
Williamson's Sapsucker
Yellow-bellied Sapsucker
Red-naped Sapsucker
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Yellow-bellied/Red-naped Sapsucker
Lewis's Woodpecker
Red-headed Woodpecker
Downy Woodpecker
Hairy Woodpecker
Downy/Hairy Woodpecker
Northern Flicker
Crested Caracara
American Kestrel
Merlin
Gyrfalcon
Peregrine Falcon
Prairie Falcon
large falcon sp.
small falcon sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
falcon sp.
diurnal raptor sp.
Budgerigar
Monk Parakeet
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
Western Flycatcher
Empidonax sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Black Phoebe
Eastern Phoebe
Say's Phoebe
Ash-throated Flycatcher
Cassin's Kingbird
Western Kingbird
Cassin's/Western Kingbird
Eastern Kingbird
Scissor-tailed Flycatcher
new world flycatcher sp.
Cassin's Vireo
Plumbeous Vireo
Cassin's/Plumbeous Vireo
Philadelphia Vireo
Warbling Vireo
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Red-eyed Vireo
Loggerhead Shrike
Northern Shrike
Loggerhead/Northern Shrike
Steller's Jay
Blue Jay
Woodhouse's Scrub-Jay
Black-billed Magpie
Clark's Nutcracker
American Crow
Common Raven
raven sp.
Black-capped Chickadee
Mountain Chickadee
Black-capped x Mountain Chickadee (hybrid)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Black-capped/Mountain Chickadee
chickadee sp.
Horned Lark
Bank Swallow
Tree Swallow
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
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Pygmy Nuthatch
Red-breasted Nuthatch
nuthatch sp.
Brown Creeper
Blue-gray Gnatcatcher
Rock Wren
Canyon Wren
House Wren
Winter Wren
Marsh Wren
Carolina Wren
Bewick's Wren
American Dipper
European Starling
Gray Catbird
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Curve-billed Thrasher
Brown Thrasher
Long-billed Thrasher
Sage Thrasher
Northern Mockingbird
Eastern Bluebird
Western Bluebird
Mountain Bluebird
bluebird sp.
Townsend's Solitaire
Varied Thrush
Swainson's Thrush
Hermit Thrush
Catharus sp.
Wood Thrush
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
American Robin
Bohemian Waxwing
Cedar Waxwing
Bohemian/Cedar Waxwing
House Sparrow
American Pipit
Evening Grosbeak
House Finch
Cassin's Finch
Red Crossbill
Pine Siskin
Lesser Goldfinch
American Goldfinch
new world goldfinch sp.
Lapland Longspur
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Thick-billed Longspur
Cassin's Sparrow
Grasshopper Sparrow
Chipping Sparrow
Clay-colored Sparrow
Brewer's Sparrow
Spizella sp.
Lark Sparrow
Lark Bunting
American Tree Sparrow
Spizella sp./American Tree Sparrow
Fox Sparrow
Dark-eyed Junco
White-crowned Sparrow
Harris's Sparrow
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
White-throated Sparrow
Vesper Sparrow
Savannah Sparrow
Song Sparrow
Lincoln's Sparrow
Swamp Sparrow
Green-tailed Towhee
Spotted Towhee
Spotted/Eastern Towhee (Rufous-sided Towhee)
new world sparrow sp.
Yellow-breasted Chat
Yellow-headed Blackbird
Bobolink
Western Meadowlark
Sturnella meadowlark sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Orchard Oriole
Bullock's Oriole
Baltimore Oriole
Bullock's x Baltimore Oriole (hybrid)
Bullock's/Baltimore Oriole
Red-winged Blackbird
Brown-headed Cowbird
Rusty Blackbird
Brewer's Blackbird
Rusty/Brewer's Blackbird
Common Grackle
Great-tailed Grackle
blackbird sp.
Ovenbird
Worm-eating Warbler
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Northern Waterthrush
Black-and-white Warbler
Prothonotary Warbler
Tennessee Warbler
Orange-crowned Warbler
Nashville Warbler
Virginia's Warbler
MacGillivray's Warbler
Mourning Warbler
Common Yellowthroat
American Redstart
Cape May Warbler
Northern Parula
Magnolia Warbler
Bay-breasted Warbler
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Yellow Warbler
Chestnut-sided Warbler
Blackpoll Warbler
Black-throated Blue Warbler
Palm Warbler
Pine Warbler
Yellow-rumped Warbler
Yellow-throated Warbler
Black-throated Gray Warbler
Townsend's Warbler
Wilson's Warbler
new world warbler sp.
Summer Tanager
Scarlet Tanager
Western Tanager
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Northern Cardinal
Rose-breasted Grosbeak
Black-headed Grosbeak
Rose-breasted/Black-headed Grosbeak
Blue Grosbeak
Lazuli Bunting
Indigo Bunting
Lazuli x Indigo Bunting (hybrid)
passerine sp.

KEY:| = insufficient data | = rare to widespread

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