Like amazon parrots and macaws, cockatoos frequently develop cloacal papillomas. The birds include macaws, South American parrots, and Australian cockatoos. Cockatoos are also noisier than many parrots. Manzanita wood is also used as perches for parrots and other large pet birds. Deer, sambars, barking deer, parrots, woodpeckers and peacocks inhabit the protected forests. Cockatoos are also, on average, larger than the true parrots. Australian parrots comprise a sixth of the world's parrots, including many cockatoos and galahs. It is a member of the large group of neotropical parrots known as macaws. Songbirds, parrots, and other species are popular as pets. These include dogs, cats, parrots and tortoises. Their beaks also share similarities with the beaks of herbivorous parrots and tortoises. There are many species of colourful parrots as well as estuarine crocodiles. The Xujans are masters of the local lions and worshippers of parrots and monkeys. Bobwhites are generally compatible with most parrots, softbills and doves. Some animals such as parrots and pigs ingest clay for similar reasons.