Proahaetulla antiqua
Habitat
High-elevation montane rainforest; arboreal and active by day
Range
Far south of the Western Ghats: Agasthyamalai Hills of Tamil Nadu and Kerala
The keeled vine snake is the only species of its genus and is endemic to the Western Ghats of India. Its natural habitat is montane rainforest of the southern Western Ghats. It was first discovered in 2011, when an individual was found in the Agasthyamalai Hills of Tamil Nadu and Kerala (Wikipedia, general species account).
It is bright green with a lighter green or creamy yellow belly and a creamy yellow stripe along the belly. It has a fine-pointed snout and near-binocular vision, with horizontally elliptical pupils. It is active by day and lives in trees in the high-elevation rainforests of the far south of the Western Ghats.