animal animals beast of burden bovine camel Camel cavalry camelids camelus caravan cattle desert domestic domesticated animal dromedary feral herd hump India krayker ungulates bird birds bread columba livia domestica common domestic pigeon fancy pigeons fauna feathers pigeon plumage prolific rock pigeon symbol. symbolic variations variety white Incredible India Camel Ride carry help traffic transport Ungulate Australian breeding burrows control damage damaging danger destructive devastating digging ecosystem environmental erosion invasive mammal mammalian pest pest pest control populated rabbits reproductive spread threat uncontrollable widespread wild wildlife