[3] 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.
There are unconfirmed reports of the red-tailed tropicbird (Phaethon rubricauda), Pacific black duck (Anas superciliosa) and sharp-tailed sandpiper (Calidris acuminata) but these are not included in the list.
These are adapted for an aquatic existence, with webbed feet, bills that are flattened to a greater or lesser extent, and feathers that are excellent at shedding water due to special oils.
Order: Caprimulgiformes Family: Apodidae Swifts are small birds which spend the majority of their lives flying.
They are small to medium-sized birds with compact bodies, short, thick necks and long, usually pointed, wings.
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.
Terns are a group of generally medium to large seabirds typically with grey or white plumage, often with black markings on the head.
Order: Phaethontiformes Family: Phaethontidae Tropicbirds are slender white birds of tropical oceans, with exceptionally long central tail feathers.
Order: Procellariiformes Family: Oceanitidae The southern storm-petrels are the smallest seabirds, relatives of the petrels, feeding on planktonic crustaceans and small fish picked from the surface, typically while hovering.
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.
Order: Suliformes Family: Fregatidae Frigatebirds are large seabirds usually found over tropical oceans.
Members of Ardeidae fly with their necks retracted, unlike other long-necked birds such as storks, ibises and spoonbills.
Some are colourful with yellow, red or orange vents, cheeks, throats or supercilia, but most are drab, with uniform olive-brown to black plumage.