Pine Barrens Treefrog

Fascinating facts about the Pine Barrens Treefrog

• A frog just 2.8–4.3 cm long can flash a white-bordered lavender stripe along its emerald back, a tiny billboard that separates it from the look-alike American green tree frog. Seeing that line means you’ve found Dryophytes andersonii, not its cousin.
• When the breeding season starts in late April, these tree frogs begin a chorus that can last all the way to August, yet they never stray farther than about 70 m (230 ft) from their chosen pond. Some bold individuals have been tracked as far as 100 m (330 ft) away. Their loyalty to a single, often temporary, acidic pool makes every rainy spring a make-or-break moment for the next generation. It shows how tightly their life cycle is glued to fleeting water spots.
• The perfect egg-laying water for the Pine Barrens tree frog sits at a pH between 3.74 and 4.69, so acidic it would feel like lemon juice to most amphibians. Females drop single eggs that are only 1.2–1.4 mm in diameter, then the tadpoles sprint through metamorphosis by July-August. This razor-thin window means a dry summer can wipe out an entire cohort. It highlights the species’ vulnerability to climate swings and water-level changes.
• Although the frog once vanished from a single Georgia site, its strongest stronghold remains the New Jersey Pine Barrens, where the largest known populations still cling to the landscape. The species now lives in just three disjunct regions along the Atlantic Coastal Plain, a patchwork that includes the Sandhills of the Carolinas and the Florida-Alabama panhandle. Such fragmented distribution turns each wetland into a critical refuge. It reminds us that preserving even small habitat islands can keep an entire species alive.
• In 1983, pop-art legend Andy Warhol added this tiny amphibian to his “Endangered Species” portfolio, joining icons like the Siberian tiger and the giant panda. The prints were meant to boost support for the 1973 Endangered Species Act. The frog was later listed as Least Concern in the IUCN’s 2023 assessment.

At a glance

About the Pine Barrens Treefrog

The Pine Barrens tree frog (Dryophytes andersonii) is a diminutive New World tree frog, measuring just 2.8–4.3 cm from snout to vent. Its emerald-green back is framed by a striking white stripe that gives way to a lavender band edged in white, a key field mark that separates it from the similar American green tree frog. Beneath, the belly is a mosaic of white areolae, while the hidden surfaces of the legs flash orange to yellow. Its toes are only partially webbed, the fingers free, and both bear small adhesive pads that allow it to cling to the vegetation of its wetland homes. These frogs are tied to the acidic, shallow waters of the Atlantic Coastal Plain, from the pitch-pine forests and Sphagnum bogs of the New Jersey Pine Barrens to the sandhills of the Carolinas and the cedar swamps of the Florida panhandle. They breed in isolated, low-pH ponds (pH 3.74–4.69), laying 1.2–1.4 mm eggs singly in May-June; tadpoles metamorphose by July-August. Males begin calling at the end of April and may be heard until August, while adults stay within roughly 70 m of their breeding sites, occasionally venturing out to 100 m. Their late breeding season and reliance on temporary water make them unusually vulnerable to drought and water-level fluctuations, a surprising fragility for a species that can also be found perched on roadside ruts, flooded borrow pits, and even cranberry bogs.

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