Despite the harsh climate many animals make their home in Death Valley.  According to the Park Service's visitor guide, "Death Valley is home to 51 species of native mammals, 307 species of birds, 36 species of reptiles, three species of amphibians, and six species of fish."  Lizards or ravens are fairly easy to spot.  One may catch a quick glimpse of an owl, fox or rabbit.  At night one frequently hears coyotes.  Sometimes there are just tracks in the sand or snow to indicate where an animal has been.
Twin ant hills; the harvester ants were busy at work.
Flies on algae.
Salt Creek Pupfish (Cyprinodon salinus), about 1 1/2 inches long, dart around in the shallow creek and (below) congregate under a walkway.  Salt Creek is more salty than ocean water.
Lizard in rocky and salty terrain.
Snake track in the Mesquite Dunes.
Bird prints.
Tracks in the snow near the Beehive Kilns in the Panamint Range.