American Green Tree Frog (Dryophytes cinereus)

Order: Anura; Family: Hylidae; Genus: Dryophytes; Species: D. cinereus. The Hylidae family is characterized by arboreal adaptations including specialized toe pads and a skeletal structure supporting climbing.

Species

Family

Size

Adults typically range from 1.25 to 2.5 inches (3.2 to 6.4 cm) in snout-to-vent length (SVL). Females are generally larger than males. They are lightweight, weighing only a few grams, allowing them to cling to thin reeds and leaves.

Conservation

Listed as Least Concern (IUCN). Populations are generally stable and and they are highly adaptable to human-altered landscapes, though they are susceptible to local declines due to water pollution and habitat drainage.

Description

The American Green Tree Frog is the 'poster child' of Southern wetlands. Its vibrant, waxy-green skin and clean white racing stripe make it one of North America's most aesthetically pleasing amphibians. In its natural habitat, it blends perfectly with the waxy leaves of cattails and palmettos, often hiding in plain sight until the night air fills with its sharp, rhythmic metallic calls.

Key Features

Bright green dorsum; smooth skin; distinct white or cream lateral line from jaw to mid-body; large toe pads; horizontal pupils.

Physical Description

A medium-sized, slender frog with a smooth-skinned, streamlined body. It features a rounded snout, horizontal pupils with a gold or copper iris, and a distinct, circular tympanum (eardrum) visible behind the eye. Its limbs are long with significantly developed toe pads used for gripping vertical surfaces.

Skin Texture & Coloration

The skin is remarkably smooth and moist. Dorsal coloration is typically a vibrant lime or bright green, though it can change to olive-drab or gray depending on temperature and activity. A characteristic white or cream-colored lateral stripe usually extends from the jaw down the length of the body. The ventral (underside) skin is pale, creamy-white to yellow, and more granular (warty) in texture to assist in water absorption.

Distinguishing Features

The most definitive field mark is the crisp, white or pale yellow lateral stripe extending from the side of the head along the flanks. Unlike the similar Squirrel Tree Frog, this species is usually larger and lacks the spotted markings on the thighs. The presence of large, circular toe pads and a very smooth back are key.

Habitat

Primarily arboreal and semi-aquatic. They prefer margins of lakes, leaf-choked swamps, marshes, and slow-moving streams. They are common in suburban gardens, particularly near outdoor lights or swimming pools, and are often found clinging to tall vegetation or reeds.

Geographic Range

Native to the Southern and Central United States, extending from the Delmarva Peninsula south through Florida, and west to Central Texas and up the Mississippi Valley to Illinois.

Behavior

Nocturnal and highly arboreal. During the day, they remain tucked against leaves to minimize moisture loss. They are known for 'rain calls'—vocalizing during or before humid weather outside of the breeding season. They are agile jumpers but move with a slow, deliberate walking motion when hunting.

Diet & Feeding

An insectivore that utilizes a sit-and-wait ambush strategy. They primarily eat crickets, moths, flies, and beetles. They are frequently observed near porch lights at night, capitalizing on the insects attracted to the light source.

Reproduction

Breeding occurs from March to October, triggered by heavy rains. Males call from vegetation near or over water. They exhibit axillary amplexus. Females lay clutches of up to 400 eggs in shallow water attached to floating vegetation.

Vocalizations

The advertisement call is a series of nasal, metallic 'queenk-queenk-queenk' sounds, repeated rapidly. From a distance, a large chorus sounds like a repetitive ringing or clanging. It is distinct from the rasping 'scold' of the Squirrel Tree Frog.

Life Cycle

Eggs hatch into greenish-brown tadpoles within 4 to 14 days. The larval stage lasts roughly 28 to 45 days depending on water temperature. Metamorphosis occurs in late summer, with juveniles moving into surrounding vegetation. Lifespan in the wild is typically 2-5 years; longer in captivity.

Conservation Status

Toxicity & Defense

Not toxic to humans. They rely on crypsis (camouflage) as their primary defense. When threatened, they may remain perfectly still or perform a sudden, long-distance jump to escape. Skin secretions are mild but can be irritating to human mucous membranes (eyes/nose).

Ecological Role

Acts as both a vital mid-level predator of nocturnal insects and a prey source for larger vertebrates such as snakes (especially Ribbonsnakes), birds (herons), and larger frogs.

Similar Species

Squirrel Tree Frog (Dryophytes squirellus) - smaller, lacks the crisp white line, often has spots on thighs. Barking Tree Frog (Dryophytes gratiosus) - larger, more robust, skin has a granular texture and dark circular spots.

Observation Tips

Look near outdoor light fixtures on warm, humid nights. During the day, check the undersides of large leaves or inside the whorls of garden plants. Listening for their 'clanging' chorus during summer rains is the easiest way to locate a colony.

Handling & Safety

Handle only with wet hands to protect their sensitive, permeable skin. Avoid wearing lotions or insect repellents if you must touch them. Soap and water should be used to wash hands after contact to avoid irritation from skin secretions or potential bacteria like Salmonella.

Seasonal Activity

Active from spring through autumn. In the southern parts of their range, they may be active year-round during warm spells. During cold winters, they retreat into hollow logs or deep under barks into a state of brumation.

Cultural Significance

A popular species in the pet trade due to its hardiness and color. In Southern folklore, their frequent calling is often interpreted as a reliable sign of approaching rain.

Interesting Facts

It is the official state amphibian of Louisiana and Georgia. They can undergo physiological color changes from bright green to dark brown in under an hour to better match their environment or regulate heat.

Identified on 4/13/2026