There are around 435 species in this diverse family of frogs. Most species of narrowmouth frogs are found in temperate and tropical regions in South America, Africa, Asia, Indonesia, and parts of Australia. The largest number of species is found in Madagascar and New Guinea. There are some species found in North and Central America.

Most species in this family have narrow mouths and pointed heads. They range in size from less than an inch to four inches in length. They are found in a variety of habitats, from wet forests to dry deserts. Some species live on land and others live in trees.

In North America, the Mexican narrow-mouthed toad, also known as the sheep frog, is found in southern Texas and Mexico. It is about an inch in length and has a small, pointed head; a fold of skin down its back; yellowish-brown skin; and long toes. It is nocturnal and its call sounds like a sheep’s bleet.

The Eastern narrow-mouthed toad has a small, pointed head; a narrow mouth; an oval-shaped body, short legs, and spotted grayish-brown skin. It is found in the southern United States.