RASCals is designed to improve our knowledge of native and non-native reptiles and amphibians in southern California. This region is home to 22.5 million people and has experienced dramatic urbanization and habitat modification. We need your help in documenting reptiles and amphibians throughout the region so that we can examine how various species have responded to these habitat changes. We are interested in native and non-native species and in observations in all types of habitats, from relatively pristine habitats to heavily modified, urban habitats, such as backyards, schoolyards, and urban parks. This project is conducted in collaboration with iNaturalist.