Close to 15 cm. long, showed two small black collars, one closest to head showed round to throat, the one behind was only on back and ended below the shoulder area. Large head with ear slots. Light tan color above with mottled brown markings on back and tail. Back looked banded by mottled patches.
Zzyzx was the only place we saw these, and we saw several there, all super warm and active.
One of four we saw there.