Haast's eagle

Haast's eagle (Hieraaetus moorei) is an extinct species of eagle that lived in the South Island of New Zealand, commonly accepted to be the pouākai of Māori legend. It is the largest eagle known to have existed, with an estimated weight of 15 kilograms (33 pounds), compared to the next-largest and extant harpy eagle (Harpia harpyja), at up to 9 kg (20 lb). Its massive size is explained as an evolutionary response to the size of its prey, the flightless moa, the largest of which could weigh 230 kg (510 lb). Haast's eagle became extinct around 1400, following the arrival of the Māori who hunted moa to extinction, introduced the Pacific rat (Rattus exulans), and destructed large tracts of forest by fire.