Staring straight towards the camera almost not moving as they look around for predator, one on the left move its mouth and head, Sambar Deer, Rusa unicolor, Phu Khiao Wildlife Sanctuary, Thailand

phu khiao wildlife sanctuary deer sambar deer sambar rusa unicolor rusa vulnerable vulnerable species omnivorous prey antlers grass grazing cud cervidae cervinae artiodactyla mammals forests jungles wild animals nature ruminant national parks wildlife wild birds 4k resolution animals deers of asia national parks in thailand grassland ruminants in asia lake trees 4k footage brown predator natural habitat water afternoon doe stag forest sanctuary summer green hot sore ventral surface