a herd of wild red deer foraging in the snow in the scottish highlands

antlers artiodactyla cervidae cervus chambered chilly cold cover deer ecology elaphus even expansion fields foraging four frozen grass herbivore herd heritage highlands hill hind hummel hybridization increase lack land largest mammal management moorlands native natural open pastures population predation range red ruminants scotland scottish sika snow snowed stag stomach toed tree ungulates upland venison western white wild winter wintery woodlands