grey seal (halichoerus grypus) male and female mating on beach, germany

amor amorous animal beach biodiversity biological biologie biology cone seal conservation conserve couple courtship duene dune ecological ecology endotherm endothermic evolution grey 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