According to the National Park Service there's only four Mammals in the Mojave. Big horn Sheep, Black Tailed Jack Rabbit, Coyote, and Bat. It's spring so maybe a very young Coyote with his ears back zipping by. They wont have there long legs yet. Big bushy tail. Still has dark coloring. Next time stop, grab your water bottle and track that guy down. I've learned that things that run in the desert, run in spurts. So I have never had that much trouble getting eyes on something again.