You have reached the Website for the Central Sierra Audubon Society, which includes both Tuolumne and Calaveras counties. We are a chapter of the National Audubon Society and affiliated with Audubon of California. Central Sierra Audubon supports the mission of the National Audubon Society which is: to conserve and restore natural ecosystems, focusing on birds, other wildlife and their habitats, for the benefit of humanity and the Earth’s biodiversity.