Spring Peeper

Pseudacris crucifer


Spring Peeper
Spring peeper at full croak.
Missouri Department of Conservation

Hylidae (treefrogs and allies) in the order Anura (frogs)


This small, slender frog can be pink, gray, tan, or light brown and has a dark X on its back. This mark can be faint in light-colored frogs and dark on darker ones. A dark line runs across the top of the head between the eyes, and there are dark bars on the legs. The belly is a plain cream color. The finger- and toetips have adhesive pads. The high-pitched, peeping call, repeated about once a second, can be heard on warm spring nights and also during the day in early summer and fall.


Length: ¾ to 1¼ inches.

Spring Peeper

Light brown frog perched on a twig.
Spring Peeper in Callaway County
Habitat and conservation

This woodland species lives near ponds, streams, and swamps where there is thick undergrowth. Breeding occurs in fishless woodland ponds, temporary pools, water-filled ditches, or semipermanent, fishless swamps, especially if brush, branches, and rooted plants are standing in the water.


Spring peepers eat a variety of small insects and spiders.

Spring Peeper Distribution Map
Distribution in Missouri

Nearly statewide, but not found in northwestern Missouri.


Common in Missouri; this species needs access to ephemeral, swampy ponds and pools in woodlands and has become threatened in states where wetland habitat has shrunk.

Life cycle

These frogs are active from late winter to late fall; breeding is in late February to mid-May in small woodland pools. Males call from the water’s edge or from objects emerging from the water. The female lays up to 900 eggs; these are fertilized by the male as they are laid. The eggs are laid singly, attached to vegetation in shallow water, and hatch in 3–4 days. Tadpoles metamorphose 2 months later. This frog overwinters in the soil; a natural antifreeze in their blood keeps them from freezing.

Human connections

One of the first species to begin calling in the spring, this amphibian’s peeping, jingling choruses are greeted as a true harbinger for the new season.

Ecosystem connections

Tadpoles may be eaten by salamander larvae, and adults are eaten by various predators, including predaceous diving beetles and giant water bugs. Spring peepers help control populations of the insects on which they feed.