Front matter

MIGRATION of BIRDS CIRCULAR 16 FISH AND WILDLIFE SERVICE UNITED STATES DEPARTMENT OF THE INTERIOR

MIGRATION of BIRDS

By FREDERICK C. LINCOLN

Biologist

Illustrated by BOB HINES

CIRCULAR 16

UNITED STATES DEPARTMENT OF THE INTERIOR, Oscar L. Chapman, Secretary FISH AND WILDLIFE SERVICE, Albert M. Day, Director

UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1950 For sale by the Superintendent of Documents, Washington 25, D. C. Price 30 cents