These shiny black beetles are common in the Southwest. They are called a number of other different names, such as desert stink beetles, clown beetles and headstanding beetles.
When threatened, it will raise up on its back legs to stick its bottom in the air. This is a warning to stay back. For protection, it can emit a bad-smelling odor.
Thickened, leathery wing-covers protect their delicate flight wings, which they do not use. Pinacate beetles are one of the great walkers of the desert beetle world and are often encountered, seemingly wandering at random.
They occur across a variety of habitats, from open dunes to shrubs to mountains. There are several genera and over 1400 species of beetles similar to this one.