Falcon showing the forked-eye pattern on the head and barred wing feathers.
Grossman, M.L. and J. Hamlet, photos by S. Grossman 1964. Birds of Prey of the World. Clarkson N. Potter, Inc. New York. unnumbered plate following p. 160
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Falcon showing the forked-eye pattern on the head and barred wing feathers.
Grossman, M.L. and J. Hamlet, photos by S. Grossman 1964. Birds of Prey of the World. Clarkson N. Potter, Inc. New York. unnumbered plate following p. 160