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Range DescriptionPhalacrocorax carunculatus is endemic to New Zealand, where 92% of the population breeds on White Rocks, Sentinel Rock, Duffers Reef and Trio Islands, in the Marlborough Sounds, with two smaller colonies off D'Urville Island (Schuckard 1998, 2006). Birds formerly bred at D'Urville Peninsula and Te Kuru Kuru Island (Taylor 2000). Surveys between 1992 and 2002 indicate a population of c.645 birds, including 102-126 breeding pairs (Schuckard 1998, 2006). Numbers are believed to have remained stable over the last 50 years (historical counts are lower, probably because they were conducted at different times of day) (Schuckard 1994, 1998). The maximum feeding distance from the Duffers Reef colony is 24 km (Schuckard 1994).