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Bird Observations

Date Range:
Nov, 1900-2020

Boulder

Updated ~30 hr(s) ago.

256 species (+89 other taxa) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
Snow x Ross's Goose (hybrid)
 
Snow/Ross's Goose
 
 
 
 
 
Snow x Cackling Goose (hybrid)
 
Ross's x Cackling Goose (hybrid)
 
Greater White-fronted x Cackling Goose (hybrid)
 
 
Graylag x Canada Goose (hybrid)
 
Snow x Canada Goose (hybrid)
 
Cackling/Canada Goose
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Snow/Ross's x Cackling/Canada Goose (hybrid)
 
 
 
 
Trumpeter/Tundra Swan
 
swan sp.
 
goose sp.
 
 
 
 
 
 
 
Eurasian/American Wigeon
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
Mallard x Mexican Duck (hybrid)
 
Mallard/Mexican Duck
 
 
Gadwall x Northern Pintail (hybrid)
 
 
teal sp.
 
dabbling duck sp.
 
 
 
 
 
 
Ring-necked Duck x Lesser Scaup (hybrid)
 
Greater/Lesser Scaup
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Aythya sp.
 
 
 
 
scoter sp.
 
 
 
 
 
Common/Barrow's Goldeneye
 
 
 
 
Common/Red-breasted Merganser
 
merganser sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
duck sp.
 
 
 
 
 
 
 
 
 
 
 
 
Horned/Eared Grebe
 
Podiceps sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
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
 
 
 
 
 
 
American/Pacific Golden-Plover (Lesser Golden-Plover)
 
 
plover sp.
 
 
Short-billed/Long-billed Dowitcher
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
Lesser/Greater Yellowlegs
 
 
 
 
peep sp.
 
shorebird sp.
 
 
 
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
Laughing x Ring-billed Gull (hybrid)
 
 
 
 
 
 
Herring/Iceland Gull
 
Larus sp.
 
gull sp.
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
loon sp.
 
 
 
 
 
 
 
 
 
 
Glossy/White-faced Ibis
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
Sharp-shinned/Cooper's Hawk
 
 
Cooper's Hawk/American Goshawk
 
Accipiter sp.
 
 
Golden/Bald Eagle
 
 
 
 
 
Buteo sp.
 
Buteo/eagle sp.
 
hawk sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
eagle sp.
 
 
 
 
 
 
 
 
 
 
 
owl sp.
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Yellow-bellied/Red-naped Sapsucker
 
sapsucker sp.
 
 
 
 
 
 
Downy/Hairy Woodpecker
 
 
woodpecker sp.
 
 
 
 
 
large falcon sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
small falcon sp.
 
falcon sp.
 
diurnal raptor sp.
 
 
 
 
phoebe sp.
 
 
 
 
 
Loggerhead/Northern Shrike
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
jay sp.
 
 
 
 
 
 
raven sp.
 
crow/raven sp.
 
 
 
Black-capped x Mountain Chickadee (hybrid)
 
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.
 
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
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.
 
 
 
 
Haemorhous sp.
 
 
Common/Hoary Redpoll
 
 
 
 
 
 
 
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
 
 
 
 
 
 
 
new world sparrow sp.
 
 
 
Sturnella meadowlark sp.
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
blackbird sp.
 
 
 
 
 
 
 
 
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
 
 
 
 
 
new world warbler sp.
 
 
 
 
passerine sp.
 
bird sp.
 

KEY:| = insufficient data | = rare to widespread

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