This is a list of the mammal species recorded in Pitcairn. There are four mammal species in Pitcairn, all of which are marine mammals of the order Cetacea.[1]
The following tags are used to highlight each species' conservation status as assessed by the International Union for Conservation of Nature:
| DD | Data deficient | There is inadequate information to make an assessment of the risks to this species. |
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:
| LR/cd | Lower risk/conservation dependent | Species which were the focus of conservation programmes and may have moved into a higher risk category if that programme was discontinued. | |
| LR/nt | Lower risk/near threatened | Species which are close to being classified as vulnerable but are not the subject of conservation programmes. | |
| LR/lc | Lower risk/least concern | Species for which there are no identifiable risks. |
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.