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Bird Observations

Date Range:
Jan, 1900-2020

Boulder

Updated ~34 hr(s) ago.

194 species (+85 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)
 
 
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.
 
 
 
pigeon/dove sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
 
 
 
 
 
 
 
 
 
Herring x Glaucous Gull (hybrid)
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
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
 
 
 
 
 
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
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
Downy/Hairy Woodpecker
 
 
Northern/Gilded Flicker
 
woodpecker sp.
 
 
 
 
 
 
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.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
crow/raven sp.
 
 
 
Black-capped/Mountain Chickadee
 
chickadee sp.
 
 
 
 
 
Ruby-crowned/Golden-crowned Kinglet
 
 
 
 
nuthatch sp.
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
Pacific/Winter Wren
 
 
wren sp.
 
 
 
 
 
 
 
 
 
bluebird sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
 
 
 
Bohemian/Cedar Waxwing
 
 
 
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
rosy-finch sp.
 
 
 
 
Common/Hoary Redpoll
 
 
 
 
 
 
 
new world goldfinch sp.
 
finch sp.
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
longspur sp.
 
 
 
Spizella sp./American Tree Sparrow
 
 
 
 
 
 
 
Zonotrichia sp.
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
Spotted/Eastern Towhee (Rufous-sided Towhee)
 
towhee sp.
 
new world sparrow sp.
 
 
 
Sturnella meadowlark sp.
 
 
 
 
Rusty/Brewer's Blackbird
 
 
 
grackle sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
blackbird sp.
 
 
 
 
new world warbler sp.
 
 
 
passerine sp.
 
bird sp.
 

KEY:| = insufficient data | = rare to widespread

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