Pareas niger

The Black Snail-eating Snake is a nonvenomous Yunnan endemic with a largely black back, black tail and solid black crown. Irregular pale bands rise from the light belly and become stronger toward the rear of the body. The underside is pale with sparse irregular mottling. (Wikipedia, general species account)

This nocturnal, mainly arboreal snake eats snails and slugs and reproduces by laying eggs. Records centre on deciduous broadleaf forest near Mengzi at approximately 1,900m, under a subtropical monsoon climate. Pareas mengziensis has been treated as a synonym of this species. (Wikipedia, general species account)