Ключевые слова: amor, amorous, animal, beach, biodiversity, biological, biologie, biology, cone seal, conservation, conserve, couple, courtship, duene, dune, ecological, ecology, endotherm, endothermic, evolution, grey seal, hair, hairy, halichoerus grypus, helgoland, hirsute, kingdom, life, live, love, mammalogy, mammals, marine, meeressaeuger, national park mud flats, natural, nature, outdoor, predator, prey, sand, sea mammal, sows creatures, uk, united, vertebrata, vertebrate, warmblooded, wildlife,