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The Mariposa and Madera County checklists will direct you to eBird, a web site run jointly by the Cornell Lab of Ornithology and the Audubon Society. The eBird database tracks the numbers and distribution of species based on observations submitted by participants and users of the program.

Mariposa County Checklist 

Madera County Checklist 

The Yosemite National Park Checklist  provides a PDF document listing the 256 species known to have occurred in Yosemite.