Each potential habitat model was generated from numerous literature sources and personal communications with wildlife scientists. All models were reviewed by Camp Pendleton staff biologists who were familiar with the species of concern and the ecology of southern California. Additional reviews of some models were provided by biologists specializing in a particular species. The models vary in level of precision due in part to varying availability of life history and habitat-related information. Each species' potential habitat map based on HSI data delineates the estimated possible habitat for that species. The later impact map delineates the estimated changes to the habitat based on development and conservation scenarios.
The list of species for which potential habitat conditions were modeled was prepared by Camp Pendleton biologists and the research team. The use of all major plant community types found in the study area is represented by at least one selected species. The selected species are: the arroyo southwestern toad, the orange-throated whiptail lizard, the coastal cactus wren, the least Bell's vireo, the California gnatcatcher, the western bluebird, the brown headed cowbird, the gray fox, the mule deer, and the California cougar.