This report covers island fox recovery actions conducted by park staff in calendar year 2010. The recovery actions, which included island fox population and mortality monitoring, were conducted under U.S. Fish and Wildlife Service Recovery Permit TE86267-0, which has separate reporting requirements (Coonan 2011). This report presents the results of our efforts in 2010 to capture and monitor island fox populations on San Miguel and Santa Rosa Island via small trapping grids and transects, and to track annual survival and mortality causes via radiotelemetry. The purpose of the monitoring was to: * assess condition of individual foxes; * replace radiocollars or affix new radiocollars as required; * establish a "sentinel" group of unvaccinated, radiocollared animals; * vaccinate foxes against canine distemper virus and rabies; and * estimate density and islandwide population size