Download a professional PDF field guide featuring all the species found in Boulder County. Perfect for outdoor adventures, education, and nature exploration.
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Showing 20 most frequently observed species out of 80 total documented species.
Dark-Eyed Junco

Mountain Chickadee
American Robin
Hermit Thrush
Myrtle Warbler
Ruby-Crowned Kinglet

Beargrass

Broad-Tailed Hummingbird
White-Crowned Sparrow
Pine Siskin
Pillbug
American Pipit

Greek Milkweed
Red-Breasted Nuthatch
Townsend'S Solitaire

Crossbill


Black-Billed Magpie
Canada Goose
Mullein
Get all 80 species with 3-4 high-quality images each, detailed descriptions, and a downloadable PDF for offline use.
Compared to 8 nearby locations in Boulder County County, Colorado
These comparisons are based on documented wildlife observations from citizen science data. Locations with higher species counts may have more observation activity, different habitat types, or larger coverage areas. Regional rankings help identify biodiversity hotspots and unique natural areas within Boulder County County.
The Boulder County ecosystem supports 80 documented wildlife species across 73 taxonomic genera. Located in Boulder County, Colorado, this area provides critical habitat with diverse natural communities. The location hosts 17 frequently observed species and 15 occasionally documented species, creating a balanced ecosystem with both resident and visiting wildlife. Compared to nearby Boulder, Boulder County hosts 16% more species diversity.