FORAGING BEHAVIOR AND SPACING PATTERNS OF THE LIZARD CNEMIDOPHORUS UNIPARENS

Home range (HR) and core area (CA) estimates were developed for member s of a Cnemidophorus uniparens population from southeastern Arizona. L izards tended to concentrate activity in a small portion of their Hn w ith roughly 50% of activity in a CA consisting of 10% of their HR Body size was negatively correlated with HR and CA for long-term residents and positively correlated (HR) or uncorrelated cca, for transients. H R overlap was extensive, but CA overlap was minimal with many individu als using exclusive CAs, Resident lizards had relatively low HR overla p with other residents, while transients accounted for most of the HR overlap with residents and other transients, There was no relationship between HR size and amount of HR overlap for either residents or tran sients, although there was a positive relationship between HR size and the number of overlapping neighbors for both. Resident CA size was po sitively correlated with overlap and number of neighbors Transient CPI size showed no relationship to overlap or number of neighbors, Fossor ial prey, particularly termites, were numerically most abundant in the diet Digging activity was concentrated in a small portion of HR, Ther e was no evidence of lizards using consistent routes to search for ter mites; most digging episodes were unsuccessful.