african bark black coats black skin Bray common zebra equids erect manes fast grant’s zebra grazers harems herbivores herbivorous herd herds individual mammal mohawk-like manes patterns plains zebra social stiff manes stripes ungulates unique white fur white stripes zebra black-&-white black-coats black-skin common-zebra erect-manes grant’s-zebra mohawk-like-manes plains-zebra stiff-manes white-stripes Aberdeen angus agricultural agriculture Angus animal husbandry Australian beef black angus bos Bos taurus bovine breeders bulls bush cattle commercial cows farming fertile field fodder grass graziers grazing hills livestock meat production paddock polled profitable reproductivity rural solid taurine cattle broad-mouthed collagen endangered flat-mouthed gray grazer grey heavy herbivore hide horns keratin large lattice structured megafauna odd-toed ungulate perissodactyl placid powerful rhino rhinoceros skin snout southern white rhinoceros square-lipped rhinoceros strong thick threatened tough wide-lipped rhinoceros animal appearance appearances black bovidae browser capra-aegagrus-hircus domestic domesticated even-toed expression eyes farm-animal farmyard floppy-eared floppy-ears goat goats horizontal-slit-shaped-pupils horned long-eared lustrous pet rest resting ruminants sleepy sleepy-eyed white