Dark areas represent fields where Henslow's sparrows were detected. Rust-colored fields are privately owned, and green fields are state owned.
Contact information:
Rolf R. Koford
Iowa Cooperative Fish and Wildlife Research Unit
Science Hall II
Iowa State University
Ames, Iowa 50011
Telephone: (515) 294-3057
This file: http://www.public.iastate.edu/~rkoford/vanburen.htm
Updated 7 November, 1997