The Australian Ringneck (Barnardius zonarius) is a parrot native to Australia. Except for extreme tropical and highland areas, the species has adapted to all conditions. Traditionally, two species were recognised in the genus Barnardius, the Port Lincoln Parrot (Barnardius zonarius) and the Mallee Ringneck (Barnardius barnardi), but the two species readily interbred at the contact zone and are now considered one species. Currently, four subspecies are recognised, each with a distinct range.

In Western Australia, the Ringneck competes for nesting space with the Rainbow Lorikeet, an introduced species. To protect the Ringneck, culls of the lorikeet are sanctioned by authorities in this region. Overall, though, the Ringneck is not a threatened species.

The subspecies of the Australian Ringneck differ considerably in colouration. It is a medium size species around 33 cm (11 in) long. The basic colour is green, and all four subspecies have the characteristic yellow ring around the hindneck; wings and tail are a mixture of green and blue.