Chestnut-quilled Rock-Pigeon Petrophassa rufipennis

A large dark-brown pigeon with faint pale speckles on its plumage. In flight, shows chestnut wing panels, and flies with a loud clattering of wings. Found only on the sandstone area of Arnhem Land in the Northern Territory, where it can be encountered at locations throughout Kakadu National Park and beyond. Often roosts on high rocky cliffs or on top of sandstone towers; comes down to the sandy ground in the early morning and evening.