IBA Trigger species: Black-billed Gull, NZ Dotterel, Wrybill, SI Pied Oystercatcher, NZ Grebe
Besides the trigger species the following are confirmed or likely to be breeding or resident: Black Shag, Pied Shag, Little Shag, Little Black Shag, White-faced Heron, Reef Heron, Black Swan, Canada Goose, Paradise Shelduck, (Grey Duck), Mallard, Grey Teal, NZ Shoveler, NZ Scaup, Australasian Harrier, Banded Rail, Pukeko, Variable Oys-tercatcher, Pied Stilt, Banded Dotterel, Black-fronted Dotterel, Spur-winged Plover, Southern Black-backed Gull, Red-billed Gull, Caspian Tern, White-fronted Tern, NZ Pigeon, Rock Pigeon, Barbary Dove, Spotted Dove, Eastern Rosella, Shining Cuckoo, Morepork, NZ Kingfisher, Welcome Swallow, NZ Pipit, North Island Fernbird, Grey Warbler, NZ Fantail, Silvereye, Tui, Skylark, Hedge Sparrow, Blackbird, Song Thrush, Yellowhammer, Chaffinch, Greenfinch, Goldfinch, House Sparrow, Starling, Common Myna, Australian Magpie.
Other species recorded: Australasian Gannet, White Heron, Cattle Egret, Royal Spoonbill, Mongolian Dotterel, Pacific Gold-en Plover, Turnstone, Curlew Sandpiper, Sharp-tailed Sandpiper, Pectoral Sandpiper, Red-necked Stint, Far-eastern Curlew, Asiatic Whimbrel, Great Knot, Grey Plover, Red (Lesser) Knot, Eastern Bar-tailed Godwit, Asiatic Black-tailed Godwit, Grey-tailed (Siberian) Tattler, Semi-palmated Plover, Terek Sandpiper, Arctic Skua, Little Tern.
BirdLife International (2020) Important Bird Areas factsheet: Manukau Harbour. Downloaded from http://www.birdlife.org on 20/01/2020.