Big Black Reef
The Big Black Reef, part of the Long Island Group within the Furneaux Group, is a unpopulated small, flat dolerite island, located in Bass Strait, lying west of Cape Barren Island, Tasmania, in south-eastern Australia.
Together with the nearby Boxen Island, Big Black Reef is classified by BirdLife International as an Important Bird Area because it has been recorded as supporting 288 breeding pairs of black-faced cormorants.