Biological diversity is the key to the maintenance of
the world as we know it.
The Diversity of Life, 1992
Amphibian and Reptile Atlas of Peninsular California...
The Atlas region, which includes San Diego, Orange, Riverside, and Imperial Counties in the United States and the Baja California peninsula and its associated islands in Mexico, has a rich herpetological diversity. Much of this region is arid and reptiles outnumber amphibians by a margin of seven to one.