From FWS.gov

The Desert Tortoise is a medium-sized tortoise found throughout the Mojave Desert. They have thick, trunk-like legs that help carry them around, as well as a hard domed shell. They look unlike any other tortoise or turtle you might find in the Mojave. However, you may have a hard time spotting one as they spend 95% of their time in their burrows.

Photo by Kawin Towe