Links: Birds: Birds science and research

Avian Biology - An excellent introduction to Avian biology by Gary Ritchison from the Department of Biological Sciences Eastern Kentucky University.

Backyard Birds of Modesto - Bird behavior and psychology of bird behavior in dove, finch, sparrows observed from a Modesto California backyard.

Vocalizations of Selected Bird Species of Klamath Mountains - An in-depth and interesting study of the Vocalizations of selected bird species of the Klamath Mountains mixed evergreen forests in Northwestern California. The study describes some little-known calls and includes Owl species.