ABUNDANCE AND DISTRIBUTION OF THE COMMON RAVEN AND AMERICAN CROW IN THE SAN FRANCISCO BAY AREA, CALIFORNIA

Abstract

During the breeding season of 1999, we surveyed from roads in the San Francisco Bay area to determine the regional abundance and distribution of the Common Raven (Corvus corax) and American Crow (C. brachyrhynchos). Ravens concentrated along the outer coast and occurred in relatively low numbers in some interior areas, whereas the number of crows increased significantly from the outer coast to interior and bayshore locations.