Few birds of the United States are more widely and generally distributed, and probably no one species is more isolated as to the individual pairs than the Duck Hawk, (Falco peregrinus anatum).
Proceedings of the Iowa Academy of Sciences
©1902 Iowa Academy of Science, Inc.
Bailey, B. H.
"The Duck Hawk (Falco peregrinus anatum) in Iowa,"
Proceedings of the Iowa Academy of Science, 10(1), 93-98.
Available at: https://scholarworks.uni.edu/pias/vol10/iss1/15