Most Common Species
The 20 species reported most often here, of 50 in the full guide.
Sayornis nigricans
Very Common802 obs.
Anas platyrhynchos
Mallard
Very Common796 obs.
A PDF field guide to the species reported in and around Contra Costa County, with common and scientific names and up to 3 photos of each, laid out for use in the field and offline.
The animals people report most often in and around Contra Costa County include Mallard, Chicken Hawk, House Finch, White-Crowned Sparrow and Canada Goose. Birds lead the list with 33 species, followed by 8 plants and 5 insects.
The 20 species reported most often here, of 50 in the full guide.
Mallard
Chicken Hawk
House Finch
White-Crowned Sparrow
Canada Goose
Egret
Great Egret
Dark-Eyed Junco
California Poppy
Song Sparrow
Great Blue Heron
American Coot
American Crow