Type: report

Article abstract: This document was developed based on recent scientific findings and analyses to support improved conservation outcomes for the Coastal Cactus Wren (Cactus Wren; Campylorhynchus brunneicapillus) in western San Diego County. This is accomplished by a science-based management strategy consisting of prioritized management options that land managers can select from when developing projects to improve Cactus Wren habitat. The Cactus Wren is a target species for multiple species conservation planning begun in the 1990s that has led to the conservation of remaining patches of cactus scrub in the region. Despite conservation efforts, decline and disappearance of wren populations and loss of genetic diversity have continued due to population isolation, drought, wildfire, and invasive non-native annual plants. This analysis updates management options and expands the spatial extent of a previous management plan developed by The Nature Conservancy and San Diego Management and Monitoring Program for Cactus Wrens in south San Diego County. This document compiles and analyzes data collected by USGS scientists on population size, distribution, demography, and genetic variability, as well as on habitat condition, and uses this information to score Cactus Wren locations relative to several threat metrics and other attributes that relate to spatial proximity to other locations. The results of this updated and expanded analysis can be used by land managers to plan their habitat management projects and support restoration success.