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Bird Observations

Date Range:
Jan-Dec, 1900-2022

Horsetooth Reservoir

Updated ~31 hr(s) ago.

195 species (+29 other taxa) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Snow Goose
Greater White-fronted Goose
Cackling Goose
Canada Goose
Cackling/Canada Goose
Trumpeter Swan
Wood Duck
Blue-winged Teal
Cinnamon Teal
Blue-winged/Cinnamon Teal
Northern Shoveler
Gadwall
American Wigeon
Mallard
Northern Pintail
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Green-winged Teal
Canvasback
Redhead
Ring-necked Duck
Lesser Scaup
Greater/Lesser Scaup
Long-tailed Duck
Bufflehead
Common Goldeneye
Barrow's Goldeneye
Common/Barrow's Goldeneye
Hooded Merganser
Common Merganser
Red-breasted Merganser
Common/Red-breasted Merganser
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Ruddy Duck
duck sp.
Wild Turkey
Ring-necked Pheasant
Pied-billed Grebe
Horned Grebe
Red-necked Grebe
Eared Grebe
Western Grebe
Clark's Grebe
Western/Clark's Grebe
grebe sp.
Rock Pigeon
Eurasian Collared-Dove
Mourning Dove
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
pigeon/dove sp.
Common Nighthawk
Common Poorwill
Chimney Swift
White-throated Swift
Black-chinned Hummingbird
Ruby-throated/Black-chinned Hummingbird
Calliope Hummingbird
Broad-tailed Hummingbird
hummingbird sp.
Virginia Rail
Sora
American Coot
Sandhill Crane
American Avocet
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Killdeer
Wilson's Phalarope
Spotted Sandpiper
Lesser Yellowlegs
Greater Yellowlegs
Black-legged Kittiwake
Bonaparte's Gull
Franklin's Gull
Short-billed Gull
Ring-billed Gull
Kelp Gull
Herring Gull
Great Black-backed Gull
Glaucous Gull
Herring x Glaucous Gull (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Lesser Black-backed Gull
California Gull
Glaucous-winged Gull
Herring x Glaucous-winged Gull (hybrid)
Iceland Gull
Herring/Iceland Gull
Larus sp.
gull sp.
Caspian Tern
Forster's Tern
Common Loon
Double-crested Cormorant
American White Pelican
Black-crowned Night Heron
Snowy Egret
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Great Egret
Great Blue Heron
White-faced Ibis
Turkey Vulture
Osprey
Golden Eagle
Northern Harrier
Sharp-shinned Hawk
Cooper's Hawk
American Goshawk
Bald Eagle
Red-shouldered Hawk
Broad-winged Hawk
Swainson's Hawk
Red-tailed Hawk
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Rough-legged Hawk
Ferruginous Hawk
eagle sp.
Eastern Screech-Owl
Great Horned Owl
Burrowing Owl
owl sp.
Belted Kingfisher
Lewis's Woodpecker
Red-headed Woodpecker
Downy Woodpecker
Hairy Woodpecker
Downy/Hairy Woodpecker
Northern Flicker
woodpecker sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
American Kestrel
Merlin
Peregrine Falcon
Prairie Falcon
small falcon sp.
Western Wood-Pewee
Hammond's Flycatcher
Say's Phoebe
Western Kingbird
Eastern Kingbird
new world flycatcher sp.
Yellow-throated Vireo
Cassin's Vireo
Plumbeous Vireo
Warbling Vireo
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Loggerhead Shrike
Northern Shrike
Canada Jay
Pinyon Jay
Steller's Jay
Blue Jay
Woodhouse's Scrub-Jay
Black-billed Magpie
Clark's Nutcracker
American Crow
Common Raven
Black-capped Chickadee
Mountain Chickadee
chickadee sp.
Juniper Titmouse
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Horned Lark
Tree Swallow
Violet-green Swallow
Northern Rough-winged Swallow
Barn Swallow
Cliff Swallow
swallow sp.
Bushtit
Ruby-crowned Kinglet
White-breasted Nuthatch
Pygmy Nuthatch
Red-breasted Nuthatch
Brown Creeper
Blue-gray Gnatcatcher
Rock Wren
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Canyon Wren
House Wren
American Dipper
European Starling
Gray Catbird
Sage Thrasher
Western Bluebird
Mountain Bluebird
Townsend's Solitaire
American Robin
Bohemian Waxwing
Cedar Waxwing
Bohemian/Cedar Waxwing
House Sparrow
Evening Grosbeak
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
House Finch
Cassin's Finch
Red Crossbill
Pine Siskin
Lesser Goldfinch
American Goldfinch
Cassin's Sparrow
Chipping Sparrow
Brewer's Sparrow
Lark Sparrow
Lark Bunting
American Tree Sparrow
Spizella sp./American Tree Sparrow
Dark-eyed Junco
White-crowned Sparrow
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
White-throated Sparrow
Vesper Sparrow
Song Sparrow
Spotted Towhee
new world sparrow sp.
Yellow-breasted Chat
Yellow-headed Blackbird
Western Meadowlark
Bullock's Oriole
Red-winged Blackbird
Brown-headed Cowbird
Brewer's Blackbird
Common Grackle
Great-tailed Grackle
Tennessee Warbler
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Orange-crowned Warbler
Virginia's Warbler
MacGillivray's Warbler
Common Yellowthroat
Yellow Warbler
Yellow-rumped Warbler
Wilson's Warbler
new world warbler sp.
Western Tanager
Black-headed Grosbeak
Blue Grosbeak
Lazuli Bunting
Painted Bunting
passerine sp.

KEY:| = insufficient data | = rare to widespread

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