Rarely is the Kermadec petrel recorded west of Lord Howe Island, where it maintains a small colony of less than 100 individuals on Balls Pyramid.

[3] Due to predation by cats and rats, it no longer breeds on Raoul Island, where in 1908 it had an estimated population of c. 500,000 individuals.

The larger of its two subspecies, P. n. juana, also breeds on Round Island, off Mauritius, where it may sometimes hybridise with the Trindade petrel.

[4] This species is monogamous and raises a single chick each year, which becomes independent after 100–130 days.

[5] The size of the Australian population of Pterodroma neglecta neglecta (Schlegel, 1863) remains low, partly due to ongoing predation of eggs and chicks by Purple Swamphens Porphyrio porphyrio on Phillip Island.