DISPERSAL MOVEMENTS AND SURVIVAL RATES OF JUVENILE MEXICAN SPOTTED OWLS IN NORTHERN ARIZONA

摘要

We monitored dispersal movements of 19 radiotagged juvenile Mexican Spotted Owls (Strix occidentalis lucida) in northern Arizona during 1994 and 1995. All juveniles initiated dispersal movements in September or October during both years, with most dispersing during September. Initial dispersal movements Were rapid and abrupt, but lacked a significant directional pattern. Distance from the nest to the last observed Location and the most distant location reached ranged from 0.6-72.1 and 2.1-73.5 km for individual owls, Respectively. These distances represent minimum estimates of dispersal capability because only one individual Was tracked until it settled on a territory and paired.