[4] Some subpopulations of E. guttilatus from Big Bend, Texas, northern Coahuila and Chihuahua are treated as E. marnockii by the International Union for Conservation of Nature.

They have greenish ground color with brown mottling, often with banding on the rear legs.

[1] Like most frogs, they will hop, but they are also capable of crawling, which aids them in hiding in rock crevices.

[5] Breeding occurs year-round, except at the coldest times of the winter, but generally peaks during the rainy season in April and May.

Females can lay up to three clutches of eggs a year, in a moist substrate of leaf litter or soil.