aquatic aquatic-mammal Australian-sea-lion Australian-sealion carnivore clever ear-flaps eared-seals entertaining flippers mammal mobile neophoca-cinerea pinniped sea-lion seal swimmer trainable whiskered whiskers wildlife animal Australian brown creature Dirt earth ground kangaroo macropus Marsupial nature paw standing zoo afternoon Australian collie beach border collie Canidae Companion dog dog Dog breed Domestic animal Kooikerhondje pet sand summer vertebrate breeding burrows control damage damaging danger destructive devastating digging ecosystem environmental erosion fauna feral invasive mammalian pest pest pest control populated prolific rabbits reproductive spread threat uncontrollable widespread wild adept agile attractive Australia big-footed color colored colour coloured colourful conservation endangered fur golden-yellow-limbs hardy macropod macropodidae macropods mammals marsupials native petrogale-xanthopus-xanthopus recovering recovery rock-wallaby rust-coloured South-Australia sure-footed survive surviving survivors thick-fur-coat threatened vulnerable wallaby yellow-footed-rock-wallaby