Seasonal Presence and Relative Frequency of Selected Species
This list summarizes the seasonal presence of selected bird species in Colorado, indicating whether each species occurs year-round, during the breeding season, or during the non-breeding season (winter and migration). Within each seasonal category, species are numbered and ordered from least to most frequently observed in the United States based on eBird frequency data. This ordering reflects how commonly a species has been observed by U.S. birders over time and is used here as a relative priority indicator, not as a measure of local abundance or the likelihood of encountering a species at a specific site or season within Colorado.
Gunnison Sage-Grouse
Boreal Owl
White-tailed Ptarmigan
Greater Sage-Grouse
Brown-capped Rosy-Finch
Greater Prairie-Chicken
Thick-billed Longspur
Dusky Grouse
Sharp-tailed Grouse
American Three-toed Woodpecker
Chestnut-collared Longspur
American Goshawk
Northern Pygmy-Owl
Williamson’s Sapsucker
Scaled Quail
Pinyon Jay
Mexican Duck
Chihuahuan Raven
Pine Grosbeak
Lark Bunting
Lewis’s Woodpecker
Sage Thrasher
Juniper Titmouse
American Dipper
Canada Jay
Barrow’s Goldeneye
Rufous-crowned Sparrow
Clark’s Nutcracker
Clark’s Grebe
Canyon Wren
Cassin’s Finch
Canyon Towhee
Evening Grosbeak
Mountain Bluebird
Greater Roadrunner
Neotropic Cormorant
Woodhouse’s Scrub-Jay
Pygmy Nuthatch
Gambel’s Quail
Eared Grebe
Curve-billed Thrasher
Western Grebe
Ladder-backed Woodpecker
Black-billed Magpie
Steller’s Jay
Black Rail
Flammulated Owl
Mountain Plover
Black Swift
Gray Vireo
Sagebrush Sparrow
Grace’s Warbler
Cassin’s Sparrow
Hepatic Tanager
Virginia’s Warbler
Scott’s Oriole
Gray Flycatcher
Bronzed Cowbird
Snowy Plover
Hammond’s Flycatcher
Dusky Flycatcher
Plumbeous Vireo
Lucy’s Warbler
Brewer’s Sparrow
Franklin’s Gull
Green-tailed Towhee
White-throated Swift
Black-throated Sparrow
Mississippi Kite
Black-throated Gray Warbler
Long-billed Curlew
Swainson’s Hawk
Lazuli Bunting
Least Tern
Broad-tailed Hummingbird
Bobolink
Dickcissel
Ash-throated Flycatcher
Cassin’s Kingbird
Band-tailed Pigeon
Bullock’s Oriole
Willow Flycatcher
Western Flycatcher
Least Flycatcher
Cinnamon Teal
Veery
Western Tanager
Orchard Oriole
Black-headed Grosbeak
Summer Tanager
Baltimore Oriole
Indigo Bunting
Black Rosy-Finch
Gray-crowned Rosy-Finch
Ross’s Goose
Northern Shrike
Rough-legged Hawk
Lesser Black-backed Gull
Cackling Goose
Snow Goose
American Tree Sparrow
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