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Bird Observations

Date Range:
Feb, 1900-2020

Boulder

Updated ~26 hr(s) ago.

188 species (+79 other taxa) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
Snow/Ross's Goose
 
 
 
 
Snow x Cackling Goose (hybrid)
 
 
Snow x Canada Goose (hybrid)
 
Cackling/Canada Goose
 
 
 
 
Trumpeter/Tundra Swan
 
swan sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
goose sp.
 
 
 
 
Blue-winged x Cinnamon Teal (hybrid)
 
Blue-winged/Cinnamon Teal
 
 
 
 
 
Muscovy Duck x Mallard (hybrid)
 
 
Mallard x Mexican Duck (hybrid)
 
Mallard/Mexican Duck
 
Mallard x Mottled Duck (hybrid)
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
American Wigeon x Green-winged Teal (hybrid)
 
teal sp.
 
dabbling duck sp.
 
 
 
Canvasback x Redhead (hybrid)
 
 
 
 
Greater/Lesser Scaup
 
Aythya sp.
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
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
 
 
 
Western/Clark's Grebe
 
grebe sp.
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Streptopelia sp.
 
 
 
pigeon/dove sp.
 
 
 
 
 
 
 
 
Lesser/Greater Yellowlegs
 
 
 
 
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.
 
 
 
 
 
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
owl sp.
 
 
 
 
 
 
 
 
Downy/Hairy Woodpecker
 
 
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.
 
 
 
Loggerhead/Northern Shrike
 
shrike sp.
 
 
 
 
 
 
jay sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
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.
 
 
 
 
 
 
 
Bohemian/Cedar Waxwing
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
rosy-finch sp.
 
 
 
House/Purple Finch
 
 
Haemorhous sp.
 
 
 
 
crossbill sp.
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
new world goldfinch sp.
 
finch sp.
 
 
 
Spizella sp./American Tree Sparrow
 
 
 
 
 
 
 
Zonotrichia sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
Spotted x Eastern Towhee (hybrid)
 
towhee sp.
 
new world sparrow sp.
 
 
 
Sturnella meadowlark sp.
 
 
 
 
 
Rusty/Brewer's Blackbird
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
grackle sp.
 
blackbird sp.
 
 
 
 
new world warbler sp.
 
 
 
passerine sp.
 
bird sp.
 

KEY:| = insufficient data | = rare to widespread

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