A female standing on the right wagging its tail, looking towards the camera with alarm, others resting on the ground, Sambar Deer, Rusa unicolor, Phu Khiao Wildlife Sanctuary, Thailand

sambar deer phu khiao wildlife sanctuary sambar rusa unicolor deers of asia artiodactyla rusa stag ruminants in asia grazing grassland wildlife mammals deer wild animals national parks in thailand jungles ruminant ventral surface cervidae vulnerable species natural habitat antlers forests animals herd omnivorous doe nature rainforest forest green grass predator trees cervinae resting sanctuary grass prey national parks green mud vulnerable mud bath cud afternoon sore summer hot