What is this snake called?

'Langaha madagascariensis' (commonly known as the Madagascar or Malagasy leaf-nosed snake) is a medium-sized highly cryptic arboreal species.

It is endemic to Madagascar and found in deciduous dry forests and rain forests, often in vegetation 1.5 to 2 meters above the ground.

Malagasy leaf-nosed snakes can grow up to 1 meter in length. There is considerable sexual dimorphism within the species; the males are dorsally brown and ventrally yellow with a long tapering snout, while the females are mottled grey with a flattened, leaf shaped snout. The function of their appendage is unknown, but obviously also serves as camouflage.

It is largely a sit-and-wait predator. It may show curious resting behaviour, hanging straight down from a branch. Prey items include arboreal and terrestrial lizards. Leaf-nosed snakes are oviparous with clutch sizes ranging from 5 to 11 eggs.

Malagasy leaf-nosed snakes are generally calm and reluctant to bite unless provoked. Envenomation by the snake causes severe pain in humans, but is not deadly.