The vocalizations of the relict leopard frog have been described as a "low rumbling 'snore'.

"[3] Individuals measure 4.4–8.4 cm (1.7–3.3 in), and have a narrow, brown-colored body with darker spots and a beige-colored streak on the upper lip.

[3] Its historic range is along the Colorado River in extreme northwestern Arizona, and adjacent Nevada and southwestern Utah, although true to its name, its present range seems to be restricted to the Lake Mead National Recreation Area in Nevada, rendering it extirpated in Arizona and Utah.

In the mid-20th century, the relict leopard frog was declared to be extinct.

[5] It is threatened by habitat loss to agriculture and water development as well as invasive species.