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Last updated on April 19, 2014 at 21:20 EDT

Bocaina Tree Frog, Aplastodiscus callipygius

The Bocaina Tree Frog (Aplastodiscus callipygius) or perereca-verde, is a species of frog belonging to the family Hylidae. It is native to Brazil. Its natural habitats are tropical or subtropical moist montane forests and rivers. It is threatened by loss of habitat.

It can grow to a length of about 2 inches, snout to vent. It has a broad head and a pointed snout, and vomerine teeth positioned on the roof of its mouth. The large and bulging eyes have golden irises with a horizontal slit pupil, and the tympanum is easily visible. There’s a single vocal sac within the throat. Not only is the general color of this frog green, but its muscles and bones are a green color, as well. Several species of closely related tree frogs inhabit the Brazilian forest habitat. The Bocaina tree frog has unique, large granulations in the region of its cloacae vent, which aids in distinguishing it from other species. The tadpoles are also unique.

It is an arboreal species known from the mountainous portions of south-eastern Brazil at up to 5900 feet above sea level. The majority of its range is in national parks, such as the Serra da Bocaina National Park, from where it was initially described. Its habitat is in both virgin forests and old secondary growth forests near mountain streams. It doesn’t usually occur in agricultural areas or near human settlements.

Breeding occurs between September and February. The male individual calls at night from among rocks or from the banks of streams in forests. The eggs are laid in underground nests on the muddy bank, and the developing tadpoles live on the bottom of the stream. They go though metamorphosis when they reach about .83 inches long.

Image Caption: Aplastodiscus callipygius. Credit: Diogo B. Provete/Wikipedia (CC BY-SA 2.5)

Bocaina Tree Frog Aplastodiscus callipygius