Competitive and global linear models examined to explain variation in size of 112 square-root-transformed daily ranges (95% fixed-kernel home-range contour, DR) and square-root-transformed daily core areas (50% fixed-kernel home-range contour, DCA) for three adult male and three adult female Cooper's hawk on two north Florida study areas, 1996–1997. Estimates are based on 2,229 acceptable locations (see text) collected during 112, 8-h tracking days over 12 mo. Model ranking was based on Akaike's Information Criterion (AIC) corrected for small sample size (AICc). All competitive models (within 2 AIC units) of the top model and the global model are shown. Models were fit with an identity-link function.