Adult whooper swan (Cygnus cygnus), pair on nest near Lake Myvatn, Iceland

whooper swan cygnus nest lake iceland pair adult birds wildlife nature spring parenting habitat aquatic grass breeding feathers migration serene ecosystem wetlands mating avian foraging waterfowl seasonal life cycle nesting protecting landscape animal behavior outdoor countryside tranquil companionship plumage swans tender maternal conservation natural environment biodiversity observation season communication lush