Ja. Mosher et Mr. Fuller, SURVEYING WOODLAND HAWKS WITH BROADCASTS OF GREAT HORNED OWL VOCALIZATIONS, Wildlife Society bulletin, 24(3), 1996, pp. 531-536
Pre-recorded vocalizations of great horned owls (Bubo virginianus) bro
adcast into predominantly wooded habitat along roadside survey routes
resulted in as many detections of resident red-shouldered hawks (Buteo
lineatus) and Cooper's hawks (Accipiter cooperii) as broadcasts of ea
ch conspecific calls. Survey results for 3 species, expressed as avera
ge number of contacts/route, were directly related to the number of re
sident pairs located during systematic searches conducted on foot acro
ss the study area, Regression models based on road-transect counts wer
e significant for predicting abundance of red-shouldered hawks, broad-
winged hawks (Buteo platypterus), and Cooper's hawks from our study ar
eas.