Geographic Variation in the "Hoy" Call of the Bobwhite

Intraspecific geographic variation in the "hoy" call of female Bobwhite (Colinus virginianus) was studied. Twelve morphometric characters of sonograms of this call for 38 individuals, recorded in the field at the 4 extreme corners of the species' contiguous range in the U.S., were examined by univariate and multivariate statistical techniques. In spite of the absence of striking qualitative difference apparent dialects have been detected for the four populations.