IBA Trigger Species: White-necked (White-naped) Petrel, Black-winged Petrel, Wedge-tailed Shearwater, White-faced (Kermadec), Storm Petrel*, Red-tailed Tropicbird, Grey Noddy (Grey Ternlet), Red-fronted (Kermadec) Parakeet.
* Regarded as full species in New Zealand. (NZ Checklist 2010).
Besides the trigger species the following are confirmed breeding or resident on these two islands: Kermadec Petrel, Kermadec Little Shearwater, Tasman (Masked) Booby, Sooty Tern, Black Noddy. Other species recorded: Black Shag, White-faced Heron, White-necked Heron, Australasian Harrier, Pacific Golden Plover, Grey Plover, Turnstone, Asiatic Whimbrel, Grey-tailed Tattler, Wandering Tattler, Little Tern, Long-tailed Cuckoo, NZ kingfisher, Welcome Swallow, NZ Pipit, Silvereye, Blackbird, Song Thrush, Chaffinch, Greenfinch, Goldfinch, Starling.
BirdLife International (2020) Important Bird Areas factsheet: Macauley & Haszard Islands. Downloaded from http://www.birdlife.org on 17/02/2020.