Lichanura Trivirgata (Rosy Boa)
The rosy boa is found in the Aridoamerica ecoregion, in the southwestern United States in the states of California and Arizona, and northwestern Mexico in the states of Baja California and Sonora. In California, the rosy boa ranges throughout the Colorado and Mojave Deserts and also occupies the coastal areas of Los Angeles, Orange, Riverside, and San Diego Counties. In Arizona, the rosy boa occupies the Mojave Desert and the western areas of the Sonoran Desert. It is absent from the eastern and northern halves of the state. In Sonora, the rosy boa ranges from the border with the United States south throughout the Sonoran Desert to at least as far south as Ortiz. In Baja California, the rosy boa is almost ubiquitous ranging throughout the entire peninsula except in areas of extremely dry or rockless desert.