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Bird Observations

Date Range:
Jul, 1900-2020

Boulder

Updated ~39 hr(s) ago.

267 species (+103 other taxa) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Graylag x Swan Goose (hybrid)
 
Domestic goose sp. (Domestic type)
 
 
Domestic goose sp. x Canada Goose (hybrid)
 
Cackling/Canada Goose
 
 
 
 
 
Blue-winged/Cinnamon Teal
 
 
 
 
 
Mallard/Mexican Duck
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
teal sp.
 
dabbling duck sp.
 
 
 
 
 
Aythya 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.
 
 
Yellow-billed/Black-billed Cuckoo
 
 
nighthawk sp.
 
 
 
 
Chimney/Vaux's Swift
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
large swift sp.
 
swift sp.
 
 
 
Ruby-throated/Black-chinned Hummingbird
 
 
 
 
Selasphorus sp.
 
hummingbird sp.
 
 
 
 
rail/crake sp.
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
small plover sp.
 
plover sp.
 
 
 
 
Short-billed/Long-billed Dowitcher
 
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
Tringa sp.
 
 
 
 
 
 
 
 
 
Western/Semipalmated Sandpiper
 
peep sp.
 
Scolopacidae sp.
 
shorebird sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
Larus sp.
 
gull sp.
 
 
 
 
 
 
Double-crested/Neotropic Cormorant
 
cormorant sp.
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
Yellow-crowned/Black-crowned Night Heron
 
 
 
 
 
 
 
white egret sp.
 
 
Glossy/White-faced Ibis
 
 
 
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.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
hawk sp.
 
eagle sp.
 
 
 
 
 
 
 
 
 
owl sp.
 
 
 
 
Yellow-bellied/Red-naped Sapsucker
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
sapsucker sp.
 
 
 
 
 
 
Downy/Hairy Woodpecker
 
 
woodpecker sp.
 
 
 
 
 
large falcon sp.
 
small falcon sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
falcon sp.
 
diurnal raptor sp.
 
parakeet sp.
 
 
 
 
Western/Eastern Wood-Pewee
 
 
 
 
 
Hammond's/Dusky Flycatcher
 
Gray/Dusky Flycatcher
 
 
Empidonax sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
phoebe sp.
 
 
 
 
Cassin's/Western Kingbird
 
yellow-bellied kingbird sp.
 
 
 
new world flycatcher sp.
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Cassin's/Plumbeous Vireo
 
solitary vireo sp.
 
 
 
vireo 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.
 
 
 
 
 
Tree/Violet-green Swallow
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Cliff/Cave Swallow
 
swallow 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.
 
 
 
 
 
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
bluebird sp.
 
 
 
 
Catharus sp.
 
 
 
 
 
 
 
 
 
 
Haemorhous sp.
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
 
new world goldfinch sp.
 
finch sp.
 
 
 
 
 
 
 
Spizella sp.
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
Spizella sp./American Tree Sparrow
 
 
 
 
 
 
 
 
 
 
 
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.
 
 
 
Bullock's/Baltimore Oriole
 
new world oriole sp.
 
 
 
 
Rusty/Brewer's Blackbird
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
grackle sp.
 
blackbird sp.
 
 
 
 
 
 
 
 
 
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
 
 
 
 
 
Setophaga sp.
 
 
new world warbler sp.
 
 
 
 
tanager sp. (Piranga sp.)
 
 
 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
 
Rose-breasted x Black-headed Grosbeak (hybrid)
 
Rose-breasted/Black-headed Grosbeak
 
 
 
 
Lazuli x Indigo Bunting (hybrid)
 
Lazuli/Indigo Bunting
 
 
passerine sp.
 

KEY:| = insufficient data | = rare to widespread

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