Porto Alegre Golden-eyed Treefrog

Fascinating facts about the Porto Alegre Golden-eyed Treefrog

• Spanning from Pernambuco down to Rio Grande do Sul, this frog inhabits the entire stretch of Brazil’s Atlantic Forest, even reaching inland to central Minas Gerais, proving a single species can thrive across a mosaic of ecosystems.
• Below 800 m (2,600 ft) elevation, it makes its home on forest edges and vegetation beside ponds, showing how even modest altitude limits shape amphibian distribution.
• When the first rains arrive, the whole population bursts into breeding mode at once, laying floating egg clutches in both fleeting rain-filled pools and permanent ponds, an explosive strategy that overwhelms predators.
• Despite being listed as abundant, the species is vulnerable to clear-cutting of its forest habitat and to polluted water, reminding us that even common frogs can slip toward trouble if their environment degrades.
• Its common name, Porto Alegre golden-eyed treefrog, comes from its type locality, tying scientific discovery to a specific Brazilian city and highlighting how place names preserve biological history.

At a glance

About the Porto Alegre Golden-eyed Treefrog

The Porto Alegre golden-eyed treefrog, Trachycephalus mesophaeus, is a member of the Hylidae family endemic to eastern Brazil’s Atlantic Forest, occurring from Pernambuco to Rio Grande do Sul and inland to central Minas Gerais, at elevations below 800 m (2,600 ft). It inhabits primary and secondary forest and forest edges on vegetation near waterbodies. Breeding is explosive and takes place in both temporary and permanent ponds, with egg clutches that float on the water’s surface.

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