Fea's Vipers

The Fea’s Vipers, sometimes known as Burmese vipers, were until recently thought to be a single species (Azemiops feae) that represented the ancestral form to all vipers. Recent research suggested that Fea’s viper is actually two different species based on morphology (A. feae and A. kharini) and genetic data demonstrate that Fea’s vipers are most closely related to pitvipers, and not the ancestor to all vipers. Although currently not threatened on the IUCN red list, both species are very secretive and relatively little is known about their natural history.