Librarians Internet Index

Migration of Birds: U.S. Fish and Wildlife Service Circular 16

This circular, originally authored in 1935, "effectively communicated the wonders of bird migration to a wide audience, both young and old, experienced observers of birds as well as the simply curious." Describes subsequent revisions and presents the text of the latest version, which covers the study of migration, basic migration concepts, migration routes and patterns, and related topics. Includes a bibliography. From the U.S. Geological Survey (USGS).