Adder (vipera berus) curled up on rock, view from above, peak district, uk

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