Adder (vipera berus) close-up, peak district, uk

snakes horizontals veperidae animals horizontal adder scaly reptilia wildlife cold predator reptiles serpent vertebrate carnivore vipera reptile ectotherms british peak predatory developed country england carnivora uk squamata cold blooded carnivores serpents ectothermic europe uk berus vertebrates britain blooded scaled adders serpentes limbless carnivorous nature united kingdom close up district english viperinae zoology ophidia developed countries european ectotherm snake fauna animal