This is a list of the mammal species recorded in Niue. There are 4 mammal species in Niue, none of which are known to be at risk.
The following tags are used to highlight each species' conservation status as assessed by the IUCN:
Some species were assessed using an earlier set of criteria. Species assessed using this system have the following instead of Near Threatened and Least Concern categories:
The bats' most distinguishing feature is that their forelimbs are developed as wings, making them the only mammals in the world naturally capable of flight. Bat species account for about 20% of all mammals.
Family: Pteropodidae (flying foxes, Old World fruit bats)
Subfamily: Pteropodinae
Genus: Pteropus
Insular Flying-fox Pteropus tonganus LR/lc
The order Cetacea includes whales, dolphins and porpoises. They are the mammals most fully adapted to aquatic life with a spindle-shaped nearly hairless body, protected by a thick layer of blubber, and forelimbs and tail modified to provide propulsion underwater.
Suborder: Mysticeti
Family: Balaenopteridae
Subfamily: Megapterinae
Genus: Megaptera
Humpback whale, Megaptera novaeangliae VU
Subfamily: Balaenopterinae
Genus: Balaenoptera
Minke whale, Balaenoptera acutorostrata LR/nt
Suborder: Odontoceti
Family: Physeteridae
Genus: Physeter
Sperm whale Physeter macrocephalus VU
Superfamily: Platanistoidea
Family: Ziphidae
Subfamily: Hyperoodontinae
Genus: Mesoplodon
Ginkgo-toothed Beaked Whale Mesoplodon ginkgodens DD
Family: Delphinidae (marine dolphins)
Genus: Lagenodelphis
Fraser's Dolphin Lagenodelphis hosei DD
Genus: Stenella
Spinner Dolphin Stenella longirostris LR/cd
Genus: Globicephala
Short-finned pilot whale, Globicephala macrorhynchus LR/cd
Genus: Feresa
Pygmy Killer Whale Feresa attenuata DD
Genus: Orcinus
Orca, Orcinus orca LR/cd
