agile ammotragus lervia aoudad arruis arui Barbary sheep caprid climbers crepuscular distinctive goat-antelope grazers gregarious herbivore horns jumpers mammal mane North African sandy-brown shaggy hair sure-footed sure-footed jumpers and climbers waddan wildlife adept attractive Australia Australian big-footed color colored colour coloured colourful conservation endangered fauna fur golden-yellow-limbs hardy macropod macropodidae macropods mammals Marsupial marsupials native petrogale-xanthopus-xanthopus recovering recovery rock-wallaby rust-coloured South-Australia survive surviving survivors thick-fur-coat threatened vulnerable wallaby yellow-footed-rock-wallaby