The helmet vanga (Euryceros prevostii) is a distinctive-looking bird of the vanga family, Vangidae, and is classified in its own genus, Euryceros. It is mainly blue-black, with rufous wings and a huge arched blue bill. It is restricted to lowland and lower montane rainforests of northeastern Madagascar. Its diet is composed of invertebrates, predominantly insects.
It is restricted to lowland and lower montane rainforests in north-east Madagascar. Sites where it can be found include Marojejy National Park, the Masoala National Park and Mantadia National Park. source