The tortoise is the state reptile of both California and Nevada. It is a threatened, not endangered, species.
Defenders of Wildlife estimate, “In some areas, the number of desert tortoises has decreased by 90% due primarily to human activity. Desert tortoise declines appear to have been most severe and widespread in the Western Mojave Desert.”
The National Park Service says, “Since the reproduction rate of the desert tortoise is low, the survival of every individual tortoise is important to the continuation of the species. Many of the threats to adult desert tortoises are related to or are the direct result of human activities; please be aware of how your actions can affect tortoises.”
Here are several links to sites where you can learn more about the desert tortoise: