Nyctibatrachus sabarimalai

Nyctibatrachus sabarimalai is endemic to the Western Ghats and known only from Periyar Tiger Reserve in Kerala, where the specimens used to describe it were collected. It was described in 2017, with six other species of the genus, by the herpetologist Sonali Garg and colleagues. It is a diminutive frog, with an adult male snout-vent length of 12.3-13.2 mm, found in leaf litter in wet areas at around 210 m (Wikipedia, general species account).

It is mainly brown, with a dark brown back, a greyish-white underside, light brown bands from the eyes to the middle of the back, light brown limbs and light grey hands and feet. Males give pulsed calls, each 139.9 milliseconds long with six pulses, at a frequency of around 4.4 kHz (Wikipedia, general species account).