This is a list of the mammal species recorded in Palau. There are 12 mammal species in Palau, of which 0 are critically endangered, 2 are endangered, 1 is vulnerable, and 0 are near-threatened. 1 of the species listed for Palau is considered to be extinct.
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:
Sirenia is an order of fully aquatic, herbivorous mammals that inhabit rivers, estuaries, coastal marine waters, swamps, and marine wetlands. All four species are endangered.
Family: Dugongidae
Genus: Dugong
Dugong Dugong dugon VU
The order Primates contains humans and their closest relatives: lemurs, lorisoids, monkeys, and apes.
Suborder: Haplorhini
Infraorder: Simiiformes
Parvorder: Catarrhini
Superfamily: Cercopithecoidea
Family: Cercopithecidae (Old World monkeys)
Genus: Macaca
Crab-eating macaque Macaca fascicularis LR/nt
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
Mariana fruit bat Pteropus mariannus EN
Large Palau flying fox Pteropus pilosus EX
Family: Emballonuridae
Genus: Emballonura
Polynesian sheath-tailed bat Emballonura semicaudata EN
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: Balaenopterinae
Genus: Balaenoptera
Bryde's whale, Balaenoptera edeni DD
Suborder: Odontoceti
Superfamily: Platanistoidea
Family: Physeteridae
Genus: Physeter
Sperm whale Physeter macrocephalus VU
Family: Kogiidae
Genus: Kogia
Dwarf sperm whale Kogia sima LR/lc
Family: Ziphidae
Subfamily: Hyperoodontinae
Genus: Mesoplodon
Blainville's beaked whale Mesoplodon densirostris DD
Ginkgo-toothed beaked whale Mesoplodon ginkgodens DD
Family: Delphinidae (marine dolphins)
Genus: Stenella
Spinner dolphin Stenella longirostris LR/cd
Genus: Lagenodelphis
Fraser's dolphin Lagenodelphis hosei DD
Genus: Grampus
Risso's dolphin Grampus griseus DD
Genus: Feresa
Pygmy killer whale Feresa attenuata DD
Genus: Globicephala
Pilot whale Globicephala macrorhynchus LR/cd
