Cochranella nola

Cochranella nola is a small arboreal species of glass frog. Males are about 21 mm (0.8 in) long while females are a little larger at 25 mm (1.0 in). This frog has a truncated snout and vomerine teeth, widely-separated eyes and small, indistinct tympani. The dorsal surface and flanks are finely granulated while the hands and feet are smooth. The limbs are slender, the digits having adhesive toepads; there is extensive webbing between fingers III and IV, and between the toes. The dorsal surface and flanks of this frog are a uniform green with fine white speckling; the ventral surface is white, the hind part being transparent, enabling the yellow intestines to be seen.[4] The upper lip is white, the tongue is green and the iris is white, with dark reticulations, and a horizontal pupil. The bones are dark green.[4]

Cochranella nola was first described in 1996 from the Santa Cruz Department in Bolivia, where it occurred near water courses in dry, semi-deciduous montane forests, damper montane forests and lowland rainforests, at altitudes between about 500 and 1,750 m (1,600 and 5,700 ft).[4] In 2013, the first record of its presence in Peru was recorded, it having been found in Bahuaja-Sonene National Park in the southeast of the country.[5]

In the breeding season, males call from near fast-flowing streams, either from rocks in the streambed, or from foliage up to a few meters above the water. Up to six males may call in chorus, spaced out a few centimetres apart. The calls are either single high-pitched "pinks" at irregular intervals, or groups of three "pinks" in quick succession. Females lay clutches of eggs on wet boulders.[4]

In its limited range in Bolivia, this species is common, but it is threatened by pollution of the streams where it breeds which can suffer from agricultural run-off, and the International Union for Conservation of Nature has rated it as "near-threatened". Now that it has been recorded from a further location in Peru, this frog's conservation status may need to be reassessed.[1]