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Bird Observations

Date Range:
Mar, 1900-2020

Boulder

Updated ~37 hr(s) ago.

216 species (+88 other taxa) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
Snow/Ross's Goose
 
 
 
 
 
Snow x Cackling Goose (hybrid)
 
Ross's x Cackling Goose (hybrid)
 
 
Greater White-fronted x Canada 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
 
 
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
 
 
Gadwall x Mallard (hybrid)
 
American Wigeon x Mallard (hybrid)
 
 
Mallard x Mexican Duck (hybrid)
 
Mallard/Mexican Duck
 
 
Gadwall x Northern Pintail (hybrid)
 
 
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 scaup sp. (hybrid)
 
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.
 
 
 
 
 
 
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
Horned/Eared Grebe
 
Podiceps sp.
 
 
 
Western/Clark's Grebe
 
grebe sp.
 
 
 
Rock/Band-tailed Pigeon
 
 
 
Streptopelia sp.
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
pigeon/dove sp.
 
 
 
 
 
 
 
 
 
Short-billed/Long-billed Dowitcher
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Lesser/Greater Yellowlegs
 
 
 
 
peep sp.
 
large shorebird sp.
 
shorebird sp.
 
 
 
 
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
 
Herring/Iceland Gull
 
Larus sp.
 
gull sp.
 
 
 
 
 
Yellow-crowned/Black-crowned Night Heron
 
 
 
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
 
 
 
 
 
 
 
 
 
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.
 
 
 
 
new world flycatcher sp.
 
 
Loggerhead/Northern Shrike
 
shrike sp.
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
 
 
 
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
 
 
Tree/Violet-green Swallow
 
 
 
 
swallow sp.
 
 
 
 
Ruby-crowned/Golden-crowned Kinglet
 
 
 
 
nuthatch sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
 
 
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.
 
 
 
 
 
 
new world goldfinch sp.
 
finch 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.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
new world sparrow sp.
 
 
 
Sturnella meadowlark sp.
 
 
 
 
 
Rusty/Brewer's Blackbird
 
 
 
grackle sp.
 
blackbird 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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