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Bird Observations

Date Range:
Jan-Dec, 1900-2021

[ Old Saint Vrain Rd ] [ Rabbit Mountain ] [ Lagerman Agricultural Preserve--Lagerman Reservoir ] [ Walden Ponds Wildlife Habitat--Walden & Sawhill Ponds all together ] [ Union Reservoir ]

Updated ~40 hr(s) ago.

352 species (+146 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)
Domestic goose sp. (Domestic type)
Snow x Cackling Goose (hybrid)
Ross's x Cackling Goose (hybrid)
Greater White-fronted x Cackling Goose (hybrid)
Snow x Canada Goose (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Cackling/Canada Goose
Snow/Ross's x Cackling/Canada Goose (hybrid)
Trumpeter/Tundra Swan
swan sp.
goose sp.
Blue-winged x Cinnamon Teal (hybrid)
Blue-winged/Cinnamon Teal
Blue-winged Teal x Northern Shoveler (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Eurasian/American Wigeon
Gadwall x Mallard (hybrid)
Mallard x Mexican Duck (hybrid)
Mallard/Mexican Duck
American Wigeon x Green-winged Teal (hybrid)
teal sp.
dabbling duck sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Ring-necked Duck x Greater Scaup (hybrid)
Ring-necked Duck x Lesser Scaup (hybrid)
Greater/Lesser Scaup
Aythya sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Bufflehead x Common Goldeneye (hybrid)
Common/Barrow's Goldeneye
Common/Red-breasted Merganser
merganser sp.
duck sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Horned/Eared Grebe
Podiceps sp.
Western x Clark's Grebe (hybrid)
Western/Clark's Grebe
grebe sp.
Streptopelia sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
pigeon/dove sp.
nighthawk sp.
swift sp.
Ruby-throated/Black-chinned Hummingbird
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Selasphorus sp.
hummingbird sp.
rail/crake sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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
peep sp.
Calidris sp.
Scolopacidae sp.
large shorebird sp.
shorebird sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
jaeger sp.
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 Glaucous-winged Gull (hybrid)
Herring/Iceland Gull
Larus sp.
gull sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Forster's/Common Tern
tern sp.
Arctic/Pacific Loon
loon sp.
Double-crested/Neotropic Cormorant
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Yellow-crowned/Black-crowned Night Heron
white egret sp.
Glossy x White-faced Ibis (hybrid)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Glossy/White-faced Ibis
Sharp-shinned/Cooper's Hawk
Accipiter sp.
Golden/Bald Eagle
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Buteo sp.
Buteo/eagle sp.
hawk sp.
eagle sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
owl sp.
Yellow-bellied/Red-naped Sapsucker
sapsucker sp.
Downy/Hairy Woodpecker
woodpecker sp.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec