ash bough branch cool copse England foliage Fraxinus green holt leaves peace peaceful rest restful shade spinney summer sunlight Surrey tree trees trunk wood Asian Asian-small-clawed-otter bevy bitches carnivorous couch den dogs enclosure family insulated-underfur layered-fur lodge long-guard-hairs lutra lutrinae mammal otters playful pups resting romp semiaquatic slim slinking small smallest-otters social webbed-paws zoo