Crubixa Snouted Treefrog

Fascinating facts about the Crubixa Snouted Treefrog

• A male Crubixa snouted treefrog can be as short as 22.5 mm from snout to vent, while the largest females reach 31.0 mm.
• Bright white stripes edged in dark brown run down its sides, allowing researchers to distinguish it from close relatives in the field.
• A tiny inverted-triangle blotch sits between its eyes, and dark rostral stripes sit just in front of them, giving the frog a distinctive masked look.
• The species occurs in a wide mix of wet habitats, from seasonally flooded grasslands and swampy marshes to sand-dune ponds with tall plants, found at forest edges and open areas along Brazil’s Atlantic coast.
• Even the tadpoles match the adult’s compact size, measuring 22.9–32.0 mm with a tail.

At a glance

About the Crubixa Snouted Treefrog

The Crubixa snouted treefrog, Scinax alter, is a diminutive hylid that measures 22.5–31.1 mm in snout-vent length for males and 23.9–31.0 mm for females. Its most striking feature is a pair of bright white stripes, edged in dark brown, that run down each side of its slender body, intersected by a dark brown, inverted-triangle blotch between the eyes. Small dark brown rostral stripes frame the protuberant eyes, while the inner thighs flash a lighter brown and the belly bears a muted yellow-brown hue. Vomerine teeth line the jaw. The tadpoles, ranging from 22.9 to 32.0 mm, have a long tail. Scinax alter thrives in a mosaic of subtropical and tropical habitats along Brazil’s Atlantic coast, from moist shrublands and seasonally flooded grasslands to swamps, intermittent lakes, and even sand-dune systems where tall vegetation provides refuge. It frequents arbustive plants at pond edges, perched both on the ground and in low trees, and has been recorded in the Rio Doce valley of Minas Gerais and the hillier terrains of Espírito Santo.

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