The largest of the six prion species, with an exceptionally wide bill that gives the head a chunky appearance. Occurs in dispersed flocks at sea, where it catches prey items either sitting on the water or skimming the surface for zooplankton. Can be seen around breeding colonies on the Chatham Islands, in southern New Zealand, and in the South Atlantic Ocean. The wide bill means it cannot be confused with other prions apart from Salvin’s Prion, which is smaller in overall size and has a narrower bill than the Broad-billed Prion.