Showing 15 most frequently observed species out of 100 total documented species.
Red-tailed Hawk
black phoebe
Western Bluebird
mallard
Golden-crowned Sparrow
Anna's Hummingbird
Pacific blue-bellied lizard
House Finch
lesser goldfinch
Acorn Woodpecker
California/Woodhouse's Scrub-Jay
dark-eyed junco
Canada goose
California Newt
Bufflehead
Get all 100 species with 3-4 high-quality images each, detailed descriptions, and a downloadable PDF for offline use.
Download a professional PDF field guide featuring all the species found in Contra Costa County, California. Perfect for outdoor adventures, education, and nature exploration.
Download a professional PDF field guide featuring all the species found in Contra Costa County, California. Perfect for outdoor adventures, education, and nature exploration.
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Explore 63 documented locations in Contra Costa County, California. Each area offers unique wildlife viewing opportunities with varying biodiversity levels.
Species counts represent documented wildlife observations from citizen science contributions. Higher counts often indicate areas with diverse habitats, active monitoring, or significant ecological importance. Each location offers unique opportunities to connect with Contra Costa County's natural heritage.