Scientists have caught a rare glimpse of the elusive pygmy hippo in Liberia.The team from Fauna and Flora International, the Zoological Society of London and the Forestry Development Authority of Liberia has been using camera traps to study the endangered animal. Approximately 2,000 pygmy hippos are thought to be left in the wild, and they are found in the Upper Guinea forest, which extends through the Ivory Coast, Guinea, Liberia and Sierra Leone.Little is known about these nocturnal animals, and the researchers are hoping to learn more about the hippos so they can develop a conservation action plan.