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Bird Observations

Date Range:
Jan, 1900-2023

Boulder

Updated ~34 hr(s) ago.

202 species (+88 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)
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Greater White-fronted x Canada Goose (hybrid)
 
Graylag x Canada Goose (hybrid)
 
Snow x Canada Goose (hybrid)
 
Cackling/Canada Goose
 
Snow/Ross's x Cackling/Canada Goose (hybrid)
 
 
 
 
Trumpeter/Tundra Swan
 
swan sp.
 
goose sp.
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
Muscovy Duck x Mallard (hybrid)
 
Gadwall x Mallard (hybrid)
 
American Wigeon x Mallard (hybrid)
 
 
Mallard x Mexican Duck (hybrid)
 
Mallard/Mexican Duck
 
 
American Wigeon x Northern Pintail (hybrid)
 
 
Anas sp.
 
teal sp.
 
dabbling duck sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
 
 
Greater/Lesser Scaup
 
Aythya sp.
 
 
 
 
 
 
 
Common/Barrow's Goldeneye
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
Common/Red-breasted Merganser
 
merganser sp.
 
 
duck sp.
 
waterfowl sp.
 
 
 
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
Horned/Eared Grebe
 
 
 
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.
 
 
 
 
 
plover 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 Glaucous-winged Gull (hybrid)
 
 
Herring/Iceland Gull
 
Larus sp.
 
gull sp.
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
 
 
 
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.
 
 
 
 
 
 
 
 
 
owl sp.
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
Yellow-bellied/Red-naped Sapsucker
 
 
 
 
 
 
 
Downy/Hairy Woodpecker
 
 
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.
 
 
 
 
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
jay sp.
 
 
 
 
 
 
raven sp.
 
crow/raven sp.
 
 
 
Black-capped/Mountain Chickadee
 
chickadee sp.
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
Ruby-crowned/Golden-crowned Kinglet
 
 
 
 
nuthatch sp.
 
 
 
 
 
Pacific/Winter Wren
 
 
wren sp.
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
 
 
 
bluebird sp.
 
 
 
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Bohemian/Cedar Waxwing
 
 
 
 
 
 
 
 
 
rosy-finch sp.
 
 
 
 
Common/Hoary Redpoll
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
 
new world goldfinch sp.
 
finch sp.
 
 
 
longspur sp.
 
 
 
Spizella sp./American Tree Sparrow
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
Zonotrichia sp.
 
 
 
 
 
 
Spotted/Eastern Towhee (Rufous-sided Towhee)
 
towhee sp.
 
new world sparrow sp.
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sturnella meadowlark sp.
 
 
 
 
Rusty/Brewer's Blackbird
 
 
 
grackle sp.
 
blackbird sp.
 
 
 
 
 
 
new world warbler sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
passerine sp.
 
bird sp.
 

KEY:| = insufficient data | = rare to widespread

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