Stock photography, photos: whooper swans Stock photos of whooper swans in late October on icy lake Photograph: © Esa Hiltula Click for a larger image and more information Keywords associated with this stock photo: whooper, swan, Cygnus cygnus, water, lake, two, couple, pair, bird, animal, white, nature, wildlife, migrate, migration, migrant, plumage, swim, swimming, Finland, Europe