Eudyptes pachyrhynchus nests on Stewart Island and several of its offshore islands, Solander Island and on the west to south-west coast of the South Island, New Zealand. The population is estimated at 2,500-3,000 breeding pairs, mostly nesting on predator-free islands, and divided into 12 major, fragmented breeding sites with c.100 nests or more4. Numbers appear to be declining in some populations, principally those on the mainland where predators have the greatest impact. At Open Bay Island, there was a decline of 33% between 1988 and 19951, and at Dusky Sound there were "thousands" of birds in 1900 but only a few hundred in the 1990s5. Non-breeding dispersal patterns at sea are largely unknown.
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