Nature: The Other Earthlings

acacia adult African elephant alpha female animal animal's apes Arctic Arctic fox attack Australia bear's Beethoven behavior biologists birth bond breeding bull calf carcass carnivores chase chimpanzee chital Chitwan creature cubs deer dogs dominant Douglas-Hamilton earth echidna eggs elephant elephant's estrus evolved feed foraging Fossey Fred Harrington George Schaller glands gorilla grass habitat herd howl human hundred hunting hyraxes infant joey kangaroo keep kill koala leaves lions live male mammals marsupial mate miles milk monkeys monotremes moose mother Mount Visoke musk ox musth National Park natural newborn once pack perhaps platypus polar bear polynya population pouch predators prey primates protein pups quickly rain forest researchers rest ringed seal scent marks seal season sexual silverback snow social species Sunderbans survive tail teeth termite territory tiger tigress tree trunk tusks urine Wart Ear whales wild Wildlife wolf wolf's wolves young