**Description:** A tiny, well-camouflaged tree frog identified by a dark "X" mark on its back and tan-to-brown coloration.
**Size:** 0.75 to 1.25 inches long.
**Sexual Dimorphism:** Males are smaller and have a dark throat that expands into a large vocal sac when calling.
**Behavior:** Their high-pitched "peep" is the first herald of spring. They can survive being partially frozen in winter using natural blood sugar as antifreeze.
**Habitat:** Wetlands and vernal pools during spring; forest leaf litter for the remainder of the year.