Winter coat weather

Few animals stick it out through winter in the highest peaks of the Scottish Highlands, one of Britain’s coldest and toughest habitats. But those that brave the icy winds have the place largely to themselves, with little competition and few predators. Among these hardy creatures is the ptarmigan, the only British bird to turn white in the winter, which runs across dense snow on feather-covered feet, insulated by its thick plumage.
© David Chapman/Alamy Stock Photo