To display dominance over territory and during mating season, they will often have push-up competitions!
The common Chuckwalla Sauromalus ater is a stocky, dark grey lizard that can be distinguished by its pot belly and folds of skin around the neck. The females and the young of the species are coloured slightly differently, being covered in spots or bands in lighter grey or yellow.
They prefer to run and hide from danger, and can squeeze themselves into small cracks and crevices and inflate themselves so they can't be pulled out by any would be predators.
They prefer to eat fruit and leaves rather than insects, and have been observed to have a particular preference for yellow flowers, like those of the brittle bush, which is a plant commonly found in the areas it lives in.