American Green Tree Frog (Dryophytes cinereus)
Order Anura, Family Hylidae, Genus Dryophytes. This family is characterized by specialized toe pads for climbing and many species are arboreal.
Species
American Green Tree Frog (Dryophytes cinereus)
Family
Order Anura, Family Hylidae, Genus Dryophytes. This family is characterized by specialized toe pads for climbing and many species are arboreal.
Size
Adults typically range from 1.5 to 2.5 inches (3.8 to 6.4 cm) SVL. Females are generally larger than males. Metamorphs are very small, often under 0.5 inches.
Conservation
IUCN Status: Least Concern. Populations are stable and they are highly resilient to human-altered landscapes, though they are vulnerable to local habitat destruction and heavy pesticide use.
Description
A quintessential symbol of Southern summer nights, this elegant emerald frog is often found clinging to windows or hiding in garden shrubbery. Its bright green skin and stark white stripe make it one of the most aesthetically pleasing and easily recognized amphibians in North America.
Key Features
Smooth bright green skin, long slender body, and a prominent white or cream-colored stripe extending from the snout or jaw along the side of the body.
Physical Description
A medium-sized, slender tree frog with a smooth, streamlined body and long limbs. It features large, bulbous eyes with horizontal pupils and prominent adhesive toe pads for climbing. The head is relatively narrow compared to more robust frog species.
Skin Texture & Coloration
Skin is notably smooth. Coloration is typically a bright leaf-green or yellowish-green, though it can transition to dull gray or brown depending on temperature/light. A distinct white or cream-colored lateral stripe usually runs from the jaw down the side of the body.
Distinguishing Features
The most definitive field mark is the crisp white or pale yellow stripe along the upper lip and flank. Unlike the Squirrel Tree Frog, they lack small orange spots on the inner thighs. Their size and extremely smooth skin are also diagnostic.
Habitat
Primarily arboreal in wetlands, swamps, lakesides, and marshes. They are highly adaptable to suburban environments, frequently found on porch walls, around glass doors, and in backyard vegetation near water sources or artificial lights.
Geographic Range
Native to the Southeastern United States, ranging from Delaware and various coastal states down through Florida, and west to East Texas and Arkansas. It is the state amphibian of Louisiana and Georgia.
Behavior
Nocturnal. During the day, they hide under leaves to conserve moisture. At night, they emerge to hunt. They are skilled climbers and are frequently attracted to porch lights where insects congregate.
Diet & Feeding
Primarily insectivorous, consuming flies, moths, crickets, and small beetles. They utilize a sit-and-wait ambush strategy, often striking quickly with a sticky tongue when prey approaches their perch near lights.
Reproduction
Breeding occurs from spring through summer, triggered by heavy rains. Males call from vegetation near water. Eggs are laid in small clusters attached to floating vegetation or submerged debris.
Vocalizations
A repetitive, nasal 'quack' or 'ank' sound, often compared to the sound of a duck or a distant cowbell when many call in a chorus. The call can be heard from a significant distance on warm, humid nights.
Life Cycle
Eggs hatch in 2-6 days into greenish-brown tadpoles with long tails. Metamorphosis occurs in 28-44 days. Juveniles reach sexual maturity within a year. Average wild lifespan is 2-5 years.
Conservation Status
IUCN Status: Least Concern. Populations are stable and they are highly resilient to human-altered landscapes, though they are vulnerable to local habitat destruction and heavy pesticide use.
Toxicity & Defense
Not toxic to humans. They rely on camo (crypsis) and their ability to leap long distances to avoid predators like snakes and birds. Skin secretions are mild but can irritate human eyes or mucous membranes.
Ecological Role
An important consumer of pest insects, especially mosquitoes and moths. They serve as a vital food source for aquatic birds, snakes, and larger amphibians. They are indicators of good water quality and healthy wetland ecosystems.
Similar Species
Squirrel Tree Frog (Dryophytes squirellus) which lacks the consistent white lateral stripe and is smaller; Barking Tree Frog (Dryophytes gratiosus) which is larger and has a granular skin texture with circular spots.
Observation Tips
Check glass doors or walls near outdoor lights on warm, humid nights. Listen for their nasal 'quack' calls near ponds. During the day, look for them tucked inside the leaves of broad-leafed plants like lilies or hydrangeas.
Handling & Safety
Safe to handle briefly with wet hands, but avoid it if possible. Human skin oils and residues (sunscreen/lotion) can harm their permeable skin. Always wash hands after touching to avoid potential Salmonella or irritation.
Seasonal Activity
Most active from April to September in much of their range. In warmer regions like Florida, they may be active year-round. They brumate (hibernate) under logs or bark during cold winter months.
Cultural Significance
Highly regarded as a 'friendly' garden frog and a cultural mascot of the American South. It is featured prominently in regional nature photography and as a symbol for environmental education in Georgia and Louisiana.
Interesting Facts
They are sometimes called the 'Rain Frog' or 'Weather Prophet' because their calls often intensify just before or during rainfall. They can change their color from bright green to dark brown in minutes to match their environment or regulate heat.