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Filtering by: Advisor Wiens, John A. Date issued sim 1980-07-31

Acoustical localization of concealed prey by the diurnal harrier (Circus cyaneus)

Creator:

Rice, William Richard

Abstract:

I experimentally examined the adaptive significance of the anatomical and behavioral convergence between the harrier (Circus cyaneus, also refered to as the marsh hawk) and certain owls that are capable of capturing prey in total darkness. Anatomically, both the harrier and owls have evolved a sound collecting facial ruff (a...

Resource Type:

Dissertation