Amychus manawatawhi, commonly known as the Three Kings click beetle, is a large flightless click beetle in the family Elateridae, found only on the Three Kings Islands of New Zealand.

This species was named and described by John Marris and Paul J. Johnson in 2010, based on a type specimen collected in 2006 at Lighthouse Bush on Great Island, Three Kings; the holotype was deposited in the Lincoln University Entomology Research Collection (LUNZ).

[2][3] The name manawatawhi is taken from the Māori name for Great Island, Manawa Tawhi, which translates as "panting breath", referring to the feat of Te Aopuri chief Rauru swimming to the island from the mainland.

[4] Adult A. manawatawhi can be distinguished from other Amychus species by its lack of small nodules on the back, especially on the head and elytra, compared to A. granulatus and A.

[2] The adult beetle has been collected at night from logs and the trunks of tree species such as Cordyline kaspar, Kunzea sinclairii and Meryta sinclairii, and by day from pitfall traps, litter samples, and under logs and rocks.