Common Frog (Rana temporaria) resting at water surface, close-up of head and eye, Oxfordshire, UK

uk surface vertebrates britain aquatic water horizontals blooded animals wetland amphibians horizontal frog anura head wildlife amphibious pond united kingdom frog cold frogs close up wetlands frog amphibia amphibian english insectivores temporaria zoology aquatic rana insectivora eyes oxfordshire head vertebrate ranidae insectivore resting developed countries amphibian ponds ectotherms tailless british water developed country european england uk ectotherm cold blooded eye europe animal fauna pond ectothermic animal europe