Rats have contributed to a large number of passerine extinctions after introduction on island ecosystems. Black rats (Rattus rattus) are a prominent nest predator of the endangered San Clemente Loggerhead Shrike (Lanius ludovicianus mearnsi; SCLS) on San Clemente Island. Efforts have been made to reduce rat predation of SCLS nests for decades using rodenticides and trapping. Since 2019, rat trapping efforts in excess of 5,000 trap nights per year have been used to reduce rat densities in passerine nesting habitat. In an effort to improve efficacy in our rat removal efforts, we collected microhabitat and trap placement data for 278 rat traps placed on 28 trap lines between April and September of 2023. This dataset includes variables such as overhead vegetation height, and surrounding vegetation and substrate type. We analyzed this data alongside remotely-sensed macrohabitat data (e.g., vegetation community, NDVI) and rat capture data using a generalized linear mixed model (GLMM) to assess what factors play the largest roles in a trap’s capture probability. The results may allow us to maximize our removal rates by targeting microhabitat with a comparatively high likelihood of trap success.