FIG. 3 in Feral Burros and Other Influences on Desert Tortoise Presence in the Western Sonoran Desert

FIG. 3.—Predictive surface for probability of presence of Agassiz̕s Desert Tortoises (Gopherus agassizii) in the Chemehuevi Valley, Sonoran Desert, California, USA. The probability of tortoise presence (based on all sign: live and dead tortoises, burrows, scats, drinking sites, and tracks) was derived from model averages for each of the 200 1-ha plots surveyed during 2009.