This seabird mainly breeds colonially in the Kerguelen Islands, as its common name implies.

The total number of individuals is from 3,500 to 6,500 birds, although there is no recent data from the main colony at Kerguelen.

These birds do not inhabit Kerguelen proper, instead nesting on islets free of feral cats.

These birds eat fish and marine invertebrates, especially those found in beds of the seaweed Macrocystis spp.

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