IBA Trigger species: Fiordland Crested Penguin
Besides the trigger species the following species are confirmed or likely to be breeding: Little Penguin, Sooty Shearwater, Pied Shag, Little Shag, White-faced Heron, Reef Heron, Paradise Shelduck, Mallard, Grey Duck, Variable Oystercatcher, Spur-winged Plover, Southern Black-backed Gull, Red-billed Gull, White-fronted Tern, NZ Pigeon, Morepork, NZ Kingfisher, NZ Pipit, Welcome Swallow, Brown Creeper, Grey Warbler, South Island Fantail, South Island Tomtit, Silvereye, Bellbird, Tui, Hedge Sparrow, Blackbird, Chaffinch, Redpoll, Yellowhammer. More information required.
Australasian Bittern (EN) occur in the wetland areas adjacent to the mouth of the Hollyford River.
BirdLife International (2023) Important Bird Area factsheet: Martins Bay. Downloaded from http://datazone.birdlife.org/site/factsheet/martins-bay-iba-new-zealand on 05/10/2023.