A medium-sized prion with a noticeable dark “M'' stretched across their back from wingtip to wingtip noticeable in flight. They breed on Antarctic and subantarctic islands in the South Indian, Southern and South Atlantic Oceans and are widespread and abundant at sea around these areas. Regular visitor to New Zealand and Southern Australia during the austral winter. Very similar to other prion species, especially Salvin’s prion, with the Antarctic prion having a slightly brighter blue bill with straighter sides and a larger nail at the tip.