This is perhaps the most strikingly plumaged of the family of diving-petrels. Although the appearance of diving-petrels is relatively uniform, the Magellanic is blacker above and whiter below so showing more contrast than the other species, in addition it has a white half collar and bolder whitish marking on the scapulars and trailing edge of the wings. It is a common species in the canals and fjords largely in Chile from the Chacao Channel in the north to the southernmost part of the continent in Tierra del Fuego, it is also found in southernmost Argentina. The breeding biology of this diving-petrel is unknown. At least one colony is known in Chile but it has not been studied. The voice of this seabird is also unknown. For a species that can sometimes be seen in the hundreds if not thousands in the Strait of Magellan and other sites in Chile, it is amazing how little is still known about this species.