The San Diego County Bird Atlas addresses all the county's birds – wintering birds, migrants, and exotics as well as breeding birds. Each species account covers breeding distribution, nesting habits and schedule, migration, winter distribution, conservation outlook, and taxonomy, if relevant. The accounts include a chart showing the seasonal distribution of the nesting activity of each nesting species; they have at least one map for every regular breeding and wintering species. 645 pages with 468 color photographs, illustrating 89% of the 527 species covered.