This skulking, restricted range species is endemic to the Baja peninsula. To my knowledge it has never been recorded anywhere else. A bird of this species photographed in San Diego, California on 2 August 2015 was ultimately not accepted by the California Bird Records Committee on grounds of questionable natural occurrence. It was 110 miles north of the species' northernmost known outpost in Baja. Two subspecies are recognized. This is the pale nominate race confined to southern Baja. Another race found further north averages darker. Canon PowerShot SX50 HS
Reference:
Soberanes-González, Carlos A., Claudia I. Rodríguez-Flores, Marîa del Coro Arizmendi, Guy M. Kirwan and Thomas S. Schulenberg. 2015. Gray Thrasher (Toxostoma cinereum), version 1.0. In Neotropical Birds Online (T. S. Schulenberg, editor). Cornell Lab of Ornithology, Ithaca, New York, USA. https://doi.org/10.2173/nb.grathr1.01