# List of birds of the Cook Islands

This is a list of the bird species recorded in the Cook Islands. The avifauna of the Cook Islands include a total of 88 species, of which 7 are endemic and 3 have been introduced by humans.
This list's taxonomic treatment (designation and sequence of orders, families and species) and nomenclature (common and scientific names) follow the conventions of The Clements Checklist of Birds of the World, 2022 edition. The family accounts at the beginning of each heading reflect this taxonomy, as do the species counts found in each family account. Introduced and accidental species are included in the total counts for the Cook Islands.
The following tags have been used to highlight several categories. Not all species fall into one of these categories. Those that do not are commonly occurring native species.
* (A) Accidental - a species that rarely or accidentally occurs in the Cook Islands
* (E) Endemic - a species endemic to the Cook Islands
* (Ex) Extinct - a species extinct to the Cook Islands
* (I) Introduced - a species introduced to the Cook Islands as a consequence, direct or indirect, of human actions

## Ducks, geese, and waterfowl

Order: Anseriformes Family: Anatidae
Anatidae includes the ducks and most duck-like waterfowl, such as geese and swans. These birds are adapted to an aquatic existence with webbed feet, flattened bills, and feathers that are excellent at shedding water due to an oily coating.
* Pacific black duck, Anas superciliosa
* Eastern spot-billed duck, Anas zonorhyncha
* Mallard, Anas platyrhynchos (A)
* Northern pintail, Anas acuta (A)
* Aitutaki whistling duck, Dendrocygna sp. (Ex)

## Pheasants, grouse, and allies

Order: Galliformes Family: Phasianidae
The Phasianidae are a family of terrestrial birds which consists of quails, partridges, snowcocks, francolins, spurfowls, tragopans, monals, pheasants, peafowls, grouse, ptarmigan, and jungle fowls. In general, they are plump (although they vary in size) and have broad, relatively short wings.
* Red junglefowl, Gallus gallus (I)

## Pigeons and doves

Order: Columbiformes Family: Columbidae
Pigeons and doves are stout-bodied birds with short necks and short slender bills with a fleshy cere.
* Rock pigeon, Columba livia (I)
* Cook Islands fruit-dove, Ptilinopus rarotongensis (E)
* Pacific imperial-pigeon, Ducula pacifica
* Great ground dove, Pampusana nui (Ex)
* Ducula cf. galeata (Ex)

## Cuckoos

Order: Cuculiformes Family: Cuculidae
The family Cuculidae includes cuckoos, roadrunners and anis. These birds are of variable size with slender bodies, long tails and strong legs. The Old World cuckoos are brood parasites.
* Long-tailed koel, Urodynamis taitensis

## Swifts

Order: Caprimulgiformes Family: Apodidae
Swifts are small birds which spend the majority of their lives flying. These birds have very short legs and never settle voluntarily on the ground, perching instead only on vertical surfaces. Many swifts have long swept-back wings which resemble a crescent or boomerang.
* Atiu swiftlet, Aerodramus sawtelli (E)
* Mangaia swiftlet, Aerodramus manuoi (Ex)

## Rails, gallinules, and coots

Order: Gruiformes Family: Rallidae
Rallidae is a large family of small to medium-sized birds which includes the rails, crakes, coots and gallinules. Typically they inhabit dense vegetation in damp environments near lakes, swamps or rivers. In general they are shy and secretive birds, making them difficult to observe. Most species have strong legs and long toes which are well adapted to soft uneven surfaces. They tend to have short, rounded wings and to be weak fliers.
* Mangaia rail, Gallirallus ripleyi (Ex)
* Spotless crake, Zapornia tabuensis (A)
* Mangaia crake, Porzana rua (Ex)

## Plovers and lapwings

Order: Charadriiformes Family: Charadriidae
The family Charadriidae includes the plovers, dotterels and lapwings. They are small to medium-sized birds with compact bodies, short, thick necks and long, usually pointed, wings. They are found in open country worldwide, mostly in habitats near water.
* Black-bellied plover, Pluvialis squatarola
* Pacific golden-plover, Pluvialis fulva
* Masked lapwing, Vanellus miles (A)

## Sandpipers and allies

Order: Charadriiformes Family: Scolopacidae
Scolopacidae is a large diverse family of small to medium-sized shorebirds including the sandpipers, curlews, godwits, shanks, tattlers, woodcocks, snipes, dowitchers and phalaropes. The majority of these species eat small invertebrates picked out of the mud or soil. Variation in length of legs and bills enables multiple species to feed in the same habitat, particularly on the coast, without direct competition for food.
* Bristle-thighed curlew, Numenius tahitiensis
* Whimbrel, Numenius phaeopus (A)
* Bar-tailed godwit, Limosa lapponica (A)
* Ruddy turnstone, Arenaria interpres
* Sanderling, Calidris alba
* Pectoral sandpiper, Calidris melanotos (A)
* Common sandpiper, Actitis hypoleucos (A)
* Spotted sandpiper, Actitis macularius (A)
* Gray-tailed tattler, Tringa brevipes
* Wandering tattler, Tringa incana
* Mangaia sandpiper, Prosobonia sp. (Ex)

## Skuas and jaegers

Order: Charadriiformes Family: Stercorariidae
The family Stercorariidae are, in general, medium to large birds, typically with grey or brown plumage, often with white markings on the wings. They nest on the ground in temperate and arctic regions and are long-distance migrants.
* Parasitic jaeger, Stercorarius parasiticus (A)

## Gulls, terns, and skimmers

Order: Charadriiformes Family: Laridae
Laridae is a family of medium to large seabirds, the gulls, terns, and skimmers. Gulls are typically grey or white, often with black markings on the head or wings. They have stout, longish bills and webbed feet. Terns are a group of generally medium to large seabirds typically with grey or white plumage, often with black markings on the head. Most terns hunt fish by diving but some pick insects off the surface of fresh water. Terns are generally long-lived birds, with several species known to live in excess of 30 years.
* Laughing gull, Leucophaeus atricilla (A)
* Brown noddy, Anous stolidus
* Black noddy, Anous minutus (A)
* Gray noddy, Anous albivitta
* Blue-gray noddy, Anous ceruleus
* White tern, Gygis alba
* Sooty tern, Onychoprion fuscatus
* Gray-backed tern, Onychoprion lunatus
* Black-naped tern, Sterna sumatrana
* Common tern, Sterna hirundo
* Great crested tern, Thalasseus bergii (A)

## Tropicbirds

Order: Phaethontiformes Family: Phaethontidae
Tropicbirds are slender white birds of tropical oceans, with exceptionally long central tail feathers. Their heads and long wings have black markings.
* White-tailed tropicbird, Phaethon lepturus
* Red-tailed tropicbird, Phaethon rubricauda

## Albatrosses

Order: Procellariiformes Family: Diomedeidae
The albatrosses are among the largest of flying birds, and the great albatrosses from the genus Diomedea have the largest wingspans of any extant birds.
* Black-browed albatross, Thalassarche melanophris (A)
* Royal albatross, Diomedea epomophora
* Wandering albatross, Diomedea exulans (A)

## Southern storm-petrels

Order: Procellariiformes Family: Oceanitidae
The southern storm-petrels are relatives of the petrels and are the smallest seabirds. They feed on planktonic crustaceans and small fish picked from the surface, typically while hovering. The flight is fluttering and sometimes bat-like.
* Wilson's storm-petrel, Oceanites oceanicus (A)
* White-faced storm-petrel, Pelagodroma marina (A)
* White-bellied storm-petrel, Fregetta grallaria
* Polynesian storm-petrel, Nesofregetta fuliginosa

## Northern storm-petrels

Order: Procellariiformes Family: Hydrobatidae
Though the members of this family are similar in many respects to the southern storm-petrels, including their general appearance and habits, there are enough genetic differences to warrant their placement in a separate family.
* Leach's storm-petrel, Hydrobates leucorhous (A)

## Shearwaters and petrels

Order: Procellariiformes Family: Procellariidae
The procellariids are the main group of medium-sized "true petrels", characterised by united nostrils with medium septum and a long outer functional primary.
* Southern giant-petrel, Macronectes giganteus (A)
* Northern giant-petrel, Macronectes halli (A)
* Cape petrel, Daption capense
* Kermadec petrel, Pterodroma neglecta (A)
* Herald petrel, Pterodroma heraldica
* Murphy's petrel, Pterodroma ultima
* Mottled petrel, Pterodroma inexpectata
* White-necked petrel, Pterodroma cervicalis (A)
* Black-winged petrel, Pterodroma nigripennis
* Cook's petrel, Pterodroma cookii (A)
* Gould's petrel, Pterodroma leucoptera
* Collared petrel, Pterodroma brevipes
* Phoenix petrel, Pterodroma alba (A)
* Bulwer's petrel, Bulweria bulwerii
* Tahiti petrel, Pseudobulweria rostrata
* Wedge-tailed shearwater, Ardenna pacifica (A)
* Buller's shearwater, Ardenna bulleri
* Sooty shearwater, Ardenna griseus
* Short-tailed shearwater, Ardenna tenuirostris
* Christmas shearwater, Puffinus nativitatis
* Tropical shearwater, Puffinus bailloni

## Frigatebirds

Order: Suliformes Family: Fregatidae
Frigatebirds are large seabirds usually found over tropical oceans. They are large, black and white or completely black, with long wings and deeply forked tails. The males have coloured inflatable throat pouches. They do not swim or walk and cannot take off from a flat surface. Having the largest wingspan-to-body-weight ratio of any bird, they are essentially aerial, able to stay aloft for more than a week.
* Lesser frigatebird, Fregata ariel
* Great frigatebird, Fregata minor

## Boobies and gannets

Order: Suliformes Family: Sulidae
The sulids comprise the gannets and boobies. Both groups are medium to large coastal seabirds that plunge-dive for fish.
* Masked booby, Sula dactylatra
* Brown booby, Sula leucogaster
* Red-footed booby, Sula sula

## Herons, egrets, and bitterns

Order: Pelecaniformes Family: Ardeidae
The family Ardeidae contains the bitterns, herons, and egrets. Herons and egrets are medium to large wading birds with long necks and legs. Bitterns tend to be shorter necked and more wary. Members of Ardeidae fly with their necks retracted, unlike other long-necked birds such as storks, ibises and spoonbills.
* Pacific reef-heron, Egretta sacra
* Striated heron, Butorides striata (A)

## Hawks, eagles, and kites

Order: Accipitriformes Family: Accipitridae
Accipitridae is a family of birds of prey, which includes hawks, eagles, kites, harriers and Old World vultures. These birds have powerful hooked beaks for tearing flesh from their prey, strong legs, powerful talons and keen eyesight.
* Eastern marsh-harrier, Circus spilonotus (A)

## Kingfishers

Order: Coraciiformes Family: Alcedinidae
Kingfishers are medium-sized birds with large heads, long pointed bills, short legs and stubby tails.
* Mewing kingfisher, Todirhamphus ruficollaris (E)
* Chattering kingfisher, Todirhamphus tuta

## Old World parrots

Order: Psittaciformes Family: Psittaculidae
Characteristic features of parrots include a strong curved bill, an upright stance, strong legs, and clawed zygodactyl feet. Many parrots are vividly coloured, and some are multi-coloured. In size they range from 8 cm (3.1 in) to 1 m (3.3 ft) in length. Old World parrots are found from Africa east across south and southeast Asia and Oceania to Australia and New Zealand.
* Kuhl's lorikeet, Vini kuhlii (I)
* Blue lorikeet, Vini peruviana

## Monarch flycatchers

Order: Passeriformes Family: Monarchidae
The monarch flycatchers are small to medium-sized insectivorous passerines which hunt by flycatching.
* Rarotonga monarch, Pomarea dimidiata (E)

## Reed warblers and allies

Order: Passeriformes Family: Acrocephalidae
The members of this family are usually rather large for "warblers". Most are rather plain olivaceous brown above with much yellow to beige below. They are usually found in open woodland, reedbeds, or tall grass. The family occurs mostly in southern to western Eurasia and surroundings, but it also ranges far into the Pacific, with some species in Africa.
* Cook Islands reed warbler, Acrocephalus kerearako (E)

## Starlings

Order: Passeriformes Family: Sturnidae
Starlings are small to medium-sized passerine birds. Their flight is strong and direct and they are very gregarious. Their preferred habitat is fairly open country. They eat insects and fruit. Plumage is typically dark with a metallic sheen.
* Rarotonga starling, Aplonis cinerascens (E)
* Mysterious/Mauke starling, Aplonis mavornata (Ex)
* Common myna, Acridotheres tristis (I)
* Jungle myna, Acridotheres fuscus (A)

## Waxbills and allies

Order: Passeriformes Family: Estrildidae
The estrildid finches are small passerine birds of the Old World tropics and Australasia. They are gregarious and often colonial seed eaters with short thick but pointed bills. They are all similar in structure and habits, but have wide variation in plumage colours and patterns.
* Chestnut-breasted munia, Lonchura castaneothorax