American Green Tree Frog (Dryophytes cinereus)
Order Anura; Family Hylidae; Genus Dryophytes; Species D. cinereus. Tree frogs in this family are characterized by specialized toe pads for climbing and an arboreal lifestyle.
Species
American Green Tree Frog (Dryophytes cinereus)
Family
Order Anura; Family Hylidae; Genus Dryophytes; Species D. cinereus. Tree frogs in this family are characterized by specialized toe pads for climbing and an arboreal lifestyle.
Size
Adults typically reach a snout-to-vent length (SVL) of 1.25 to 2.5 inches (3.2–6.4 cm). Females are generally larger than males. This is a medium-sized hylid compared to the smaller Spring Peeper and the larger Barking Tree Frog.
Conservation
IUCN Red List: Least Concern. The population is stable and wide-ranging. They are common throughout their range, though they are susceptible to local declines due to pesticides, habitat drainage, and water pollution.
Description
The American Green Tree Frog is the 'classic' tree frog of the American South. Often found clinging to windows or tucked into garden blooms, its vivid green color and polite, stationary daytime posture make it a favorite among naturalists. It is an icon of swampy summer nights.
Key Features
Bright green dorsal skin, smooth texture, and a distinct white or cream lateral line running từ the jaw past the mid-body. Large, rounded toe pads are always present.
Physical Description
A medium-sized, slender frog with a smooth appearance. It features a long, streamlined body, large eyes with horizontal pupils and golden-yellow irises, and prominent toe pads. The tympanum (eardrum) is distinct and smaller than the eye. Limbs are long and specialized for leaping and climbing.
Skin Texture & Coloration
The skin is smooth and moist. Dorsal coloration most commonly ranges from bright lime green to olive green, while the belly is creamy white or pale yellow. A characteristic white or pale cream stripe typically runs from the upper lip down the sides of the body, though the length of this stripe can vary.
Distinguishing Features
The most definitive field mark is the crisp white or cream-colored lateral stripe extending from the jaw along the side. Unlike the Squirrel Tree Frog, this species has smoother skin and lacks the dark spots often seen on the back of similar hylids.
Habitat
Highly adaptable, found in wetlands, swamps, lake margins, and marshes. They prefer areas with abundant floating vegetation like lily pads and cattails, but are frequent visitors to suburban backyards, gardens, and urban landscaping.
Geographic Range
Common throughout the southeastern United States, ranging from Delaware and Maryland south through Florida and west to eastern Texas and Oklahoma, extending up the Mississippi River Valley into southern Illinois.
Behavior
Primarily nocturnal. During the day, they hide under cool, moist leaves or inside flowers (as seen in the image) to avoid desiccation. They are active climbers and are frequently attracted to porch lights at night to hunt insects attracted to the glow.
Diet & Feeding
Insectivorous. They serve as an active predator of small invertebrates, including flies, mosquitoes, crickets, and moths. They utilize a 'sit-and-wait' ambush strategy, lunging with a sticky tongue to capture prey.
Reproduction
Breeding occurs from spring through late summer, often triggered by heavy rains. Males call from vegetation overhanging water. Females lay clutches of up to 400 eggs in small packets or films attached to aquatic plants. Amplexus is axillary.
Vocalizations
The advertisement call is a distinctive, nasal 'queenk-queenk-queenk' repeated rapidly. From a distance, a large chorus sounds like a series of rhythmic bells or a distant construction crew. It is highly piercing and metallic in tone.
Life Cycle
Eggs hatch in 2–5 days into aquatic tadpoles. Tadpoles are greenish with yellowish sides and reach metamorphosis in 1 to 2 months. Juveniles resemble miniature adults and typically achieve sexual maturity within one year.
Conservation Status
IUCN Red List: Least Concern. The population is stable and wide-ranging. They are common throughout their range, though they are susceptible to local declines due to pesticides, habitat drainage, and water pollution.
Toxicity & Defense
While not toxic like Poison Dart Frogs, they produce mild skin secretions that can be irritating to mucous membranes. Their primary defense is camouflage and hiding in tight crevices or foliage to avoid birds and snakes.
Ecological Role
They act as a vital mid-level link in the food web, controlling insect populations while serving as a primary food source for many species of snakes, large spiders, and wading birds.
Similar Species
Squirrel Tree Frog (Hyla squirella) is smaller, change colors frequently, and usually lacks the distinct crisp white side stripe. Barking Tree Frog (Dryophytes gratiosus) is larger, has granular skin, and circular dark spots.
Observation Tips
Look for them around outdoor lights at night during warm, humid months. During the day, inspect the 'cups' of large flowers or the undersides of broad-leaved plants like magnolias or banana trees.
Handling & Safety
Handling should be kept to a minimum. If necessary, use wet hands to protect their permeable skin from oils and salts. Always wash hands after contact to avoid potential salmonella or irritation from skin secretions.
Seasonal Activity
Active from March through October in most of its range. In Florida, they may be active year-round. They brumate (hibernate) during cold winter months under tree bark or in thick leaf litter.
Cultural Significance
A popular symbol of Southern wetlands, they frequently appear in regional art and photography. They are widely regarded as beneficial 'garden friends' due to their prodigious consumption of mosquitoes and garden pests.
Interesting Facts
The American Green Tree Frog is the official state amphibian of Louisiana and Georgia. They are known for 'weather calling,' where they vocalize during sudden drops in barometric pressure before a rainstorm.