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Bird Observations

Date Range:
Jan-Dec, 1900-2018

Weld

Updated ~31 hr(s) ago.

395 species (+159 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
Greater White-fronted Goose
Pink-footed 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)
Graylag x Canada Goose (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Snow x Canada Goose (hybrid)
Ross's x Canada Goose (hybrid)
Cackling/Canada Goose
Snow/Ross's x Cackling/Canada Goose (hybrid)
Mute Swan
Black Swan
Trumpeter Swan
Tundra Swan
Trumpeter/Tundra Swan
swan sp.
goose sp.
Muscovy Duck
Wood Duck
Blue-winged Teal
Cinnamon Teal
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Blue-winged x Cinnamon Teal (hybrid)
Blue-winged/Cinnamon Teal
Northern Shoveler
Blue-winged Teal x Northern Shoveler (hybrid)
Cinnamon Teal x Northern Shoveler (hybrid)
Gadwall
Northern Shoveler x Gadwall (hybrid)
Eurasian Wigeon
American Wigeon
Northern Shoveler x American Wigeon (hybrid)
Eurasian/American Wigeon
Mallard
Muscovy Duck x Mallard (hybrid)
Northern Shoveler x Mallard (hybrid)
Gadwall x Mallard (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
American Wigeon x Mallard (hybrid)
Mexican Duck
Mallard x Mexican Duck (hybrid)
Mallard/Mexican Duck
American Black Duck
Mallard x American Black Duck (hybrid)
Mallard x Mottled Duck (hybrid)
Northern Pintail
Mallard x Northern Pintail (hybrid)
Green-winged Teal
teal sp.
dabbling duck sp.
Canvasback
Redhead
Canvasback x Redhead (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Ring-necked Duck
Redhead x Ring-necked Duck (hybrid)
Tufted Duck
Greater Scaup
Lesser Scaup
Ring-necked Duck x Lesser Scaup (hybrid)
Tufted Duck x Lesser Scaup (hybrid)
Redhead x scaup sp. (hybrid)
Greater/Lesser Scaup
Aythya sp.
Surf Scoter
White-winged Scoter
Black Scoter
Long-tailed Duck
Bufflehead
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Common Goldeneye
Bufflehead x Common Goldeneye (hybrid)
Barrow's Goldeneye
Common x Barrow's Goldeneye (hybrid)
Common/Barrow's Goldeneye
Hooded Merganser
Bufflehead x Hooded Merganser (hybrid)
Common Goldeneye x Hooded Merganser (hybrid)
Common Merganser
Red-breasted Merganser
Common/Red-breasted Merganser
Ruddy Duck
duck sp.
Northern Bobwhite
Scaled Quail
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Wild Turkey
Sharp-tailed Grouse
Greater Prairie-Chicken
Ring-necked Pheasant
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.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Rock Pigeon
Band-tailed Pigeon
Eurasian Collared-Dove
African Collared-Dove
White-winged Dove
Mourning Dove
Eurasian Collared-Dove x Mourning Dove (hybrid)
pigeon/dove sp.
Greater Roadrunner
Yellow-billed Cuckoo
Black-billed Cuckoo
Common Nighthawk
nighthawk sp.
Common Poorwill
nightjar sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Black Swift
Chimney Swift
White-throated Swift
swift sp.
Black-chinned Hummingbird
Costa's Hummingbird
Calliope Hummingbird
Rufous Hummingbird
Broad-tailed Hummingbird
Selasphorus sp.
hummingbird sp.
King Rail
Virginia Rail
Sora
Common Gallinule
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
American Coot
Black Rail
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)
Killdeer
Semipalmated Plover
Piping Plover
Mountain Plover
Snowy Plover
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
plover sp.
Upland Sandpiper
Whimbrel
Long-billed Curlew
Hudsonian Godwit
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.
Ruddy Turnstone
Red Knot
Ruff
Stilt Sandpiper
Buff-breasted Sandpiper
Sanderling
Dunlin
Baird's Sandpiper
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
White-rumped Sandpiper
Least Sandpiper
Pectoral Sandpiper
Western Sandpiper
Semipalmated Sandpiper
Western/Semipalmated Sandpiper
peep sp.
large shorebird sp.
shorebird sp.
Long-tailed Jaeger
Parasitic Jaeger
Pomarine Jaeger
jaeger sp.
Ancient Murrelet
Little Gull
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Black-legged Kittiwake
Sabine's Gull
Bonaparte's Gull
Black-headed Gull
Laughing Gull
Franklin's Gull
Short-billed Gull
Ring-billed Gull
Herring Gull
Great Black-backed Gull
Glaucous Gull
Herring x Glaucous Gull (hybrid)
Lesser Black-backed Gull
California Gull
Glaucous-winged Gull
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Herring x Glaucous-winged Gull (hybrid)
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.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Red-throated Loon
Pacific Loon
Arctic/Pacific Loon
Common Loon
Yellow-billed Loon
loon sp.
Double-crested Cormorant
Neotropic Cormorant
Double-crested/Neotropic Cormorant
cormorant sp.
American White Pelican
Brown Pelican
American Bittern
Least Bittern
Yellow-crowned Night Heron
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Black-crowned Night Heron
Yellow-crowned/Black-crowned Night Heron
Little Blue Heron
Tricolored Heron
Snowy Egret
Green Heron
Western Cattle Egret
Great Egret
Great Blue Heron
white egret sp.
Glossy Ibis
White-faced Ibis
Glossy x White-faced Ibis (hybrid)
Glossy/White-faced Ibis
Roseate Spoonbill
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Turkey Vulture
Osprey
Golden Eagle
Mississippi Kite
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
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Red-tailed Hawk
Rough-legged Hawk
Ferruginous Hawk
Buteo sp.
Buteo/eagle sp.
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
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
owl sp.
Belted Kingfisher
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
Red-bellied Woodpecker
Downy Woodpecker
Hairy Woodpecker
Downy/Hairy Woodpecker
Northern Flicker
woodpecker sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Crested Caracara
American Kestrel
Merlin
Gyrfalcon
Peregrine Falcon
Prairie Falcon
large falcon sp.
small falcon sp.
falcon sp.
diurnal raptor sp.
Olive-sided Flycatcher
Western Wood-Pewee
Eastern Wood-Pewee
Western/Eastern Wood-Pewee
pewee sp. (Contopus sp.)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Alder Flycatcher
Willow Flycatcher
Alder/Willow Flycatcher (Traill's Flycatcher)
Least Flycatcher
Hammond's Flycatcher
Gray Flycatcher
Dusky Flycatcher
Hammond's/Dusky Flycatcher
Gray/Dusky Flycatcher
Western Flycatcher
Empidonax sp.
Black Phoebe
Eastern Phoebe
Say's Phoebe
Vermilion Flycatcher
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Ash-throated Flycatcher
Great Crested Flycatcher
Myiarchus sp.
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
Yellow-throated Vireo
Cassin's Vireo
Blue-headed Vireo
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Cassin's/Blue-headed Vireo
Plumbeous Vireo
Cassin's/Plumbeous Vireo
solitary vireo sp.
Philadelphia Vireo
Warbling Vireo
Red-eyed Vireo
vireo sp.
Loggerhead Shrike
Northern Shrike
Loggerhead/Northern Shrike
shrike sp.
Steller's Jay
Blue Jay
Woodhouse's Scrub-Jay
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Black-billed Magpie
American Crow
Common Raven
raven sp.
crow/raven sp.
Black-capped Chickadee
Mountain Chickadee
Black-capped/Mountain Chickadee
Horned Lark
Bank Swallow
Tree Swallow
Violet-green Swallow
Purple Martin
Northern Rough-winged Swallow
Barn Swallow
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Cliff Swallow
Barn x Cliff Swallow (hybrid)
swallow sp.
Bushtit
Ruby-crowned Kinglet
Golden-crowned Kinglet
White-breasted Nuthatch
Pygmy Nuthatch
Red-breasted Nuthatch
Brown Creeper
Blue-gray Gnatcatcher
Rock Wren
Canyon Wren
House Wren
Winter Wren
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sedge Wren
Marsh Wren
Sedge/Marsh Wren
Carolina Wren
Bewick's Wren
wren sp.
European Starling
Gray Catbird
Curve-billed Thrasher
Brown Thrasher
Toxostoma sp.
Sage Thrasher
Northern Mockingbird
Eastern Bluebird
Western Bluebird
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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
Cedar Waxwing
House Sparrow
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
American Pipit
Sprague's Pipit
pipit sp.
Evening Grosbeak
Gray-crowned Rosy-Finch
Black Rosy-Finch
rosy-finch sp.
House Finch
Purple Finch
Cassin's Finch
Common Redpoll
Red Crossbill
Pine Siskin
Lesser Goldfinch
American Goldfinch
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
new world goldfinch sp.
finch sp.
Lapland Longspur
Chestnut-collared Longspur
Thick-billed Longspur
longspur sp.
Snow Bunting
Cassin's Sparrow
Grasshopper Sparrow
Chipping Sparrow
Clay-colored Sparrow
Field Sparrow
Brewer's Sparrow
Spizella sp.
Black-throated Sparrow
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Lark Sparrow
Lark Bunting
American Tree Sparrow
Spizella sp./American Tree Sparrow
Fox Sparrow
Dark-eyed Junco
White-crowned Sparrow
Golden-crowned Sparrow
Harris's Sparrow
White-throated Sparrow
Zonotrichia sp.
Sagebrush Sparrow
Vesper Sparrow
LeConte's Sparrow
Savannah Sparrow
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Baird's Sparrow
Song Sparrow
Lincoln's Sparrow
Swamp Sparrow
Green-tailed Towhee
Spotted Towhee
Eastern Towhee
Spotted x Eastern Towhee (hybrid)
Spotted/Eastern Towhee (Rufous-sided Towhee)
new world sparrow sp.
Yellow-breasted Chat
Yellow-headed Blackbird
Bobolink
Western Meadowlark
Eastern Meadowlark
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Western x Eastern Meadowlark (hybrid)
Sturnella meadowlark sp.
Orchard Oriole
Bullock's Oriole
Baltimore Oriole
Bullock's x Baltimore Oriole (hybrid)
Bullock's/Baltimore Oriole
new world oriole sp.
Red-winged Blackbird
Brown-headed Cowbird
Rusty Blackbird
Brewer's Blackbird
Rusty/Brewer's Blackbird
Common Grackle
Great-tailed Grackle
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
grackle sp.
blackbird sp.
Ovenbird
Worm-eating Warbler
Northern Waterthrush
Golden-winged Warbler
Blue-winged Warbler
Black-and-white Warbler
Prothonotary Warbler
Tennessee Warbler
Orange-crowned Warbler
Lucy's Warbler
Nashville Warbler
Virginia's Warbler
Connecticut Warbler
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
MacGillivray's Warbler
Mourning Warbler
Kentucky Warbler
Common Yellowthroat
Hooded Warbler
American Redstart
Northern Parula
Magnolia Warbler
Bay-breasted Warbler
Blackburnian Warbler
Yellow Warbler
Chestnut-sided Warbler
Blackpoll Warbler
Black-throated Blue Warbler
Palm Warbler
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Pine Warbler
Yellow-rumped Warbler
Yellow-throated Warbler
Prairie Warbler
Grace's Warbler
Black-throated Gray Warbler
Townsend's Warbler
Black-throated Green Warbler
Townsend's x Black-throated Green Warbler (hybrid)
Canada Warbler
Wilson's Warbler
Painted Redstart
new world warbler sp.
Summer Tanager
Scarlet Tanager
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Western Tanager
Northern Cardinal
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
Passerina sp.
Dickcissel
passerine sp.

KEY:| = insufficient data | = rare to widespread

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