The Henderson sandpiper (''Prosobonia sauli'') is a small extinct

Polynesian sandpiper The Polynesian sandpipers form the genus ''Prosobonia''. They are small wading birds confined to remote Pacific islands of French Polynesia. Only one species is now extant, and it is rare and little known. This bird is sometimes separated in th ...

shorebird 245px, A flock of Dunlins and Red knots">Red_knot.html" ;"title="Dunlins and Red knot">Dunlins and Red knots Waders or shorebirds are birds of the order Charadriiformes commonly found wikt:wade#Etymology 1, wading along shorelines and mudflat ...

first described in 2020. It was described from subfossil remains found in 1991 and 1992 on Henderson Island, part of the Pitcairn Islands. It went extinct no earlier than the eleventh century (1000s), soon after humans arrived on Henderson Island. It is possible that these humans brought with them the

Polynesian rat The Polynesian rat, Pacific rat or little rat (''Rattus exulans''), known to the Māori as ''kiore'', is the third most widespread species of rat in the world behind the brown rat and black rat. The Polynesian rat originated in Southeast Asia, ...

, which Polynesian sandpiper populations are very vulnerable to, causing the animal to go extinct.

References

Extinct birds of Oceania Prosobonia Birds of Henderson Island Holocene extinctions {{charadriiformes-stub