Endemics
We have no way of knowing what kind of land bird was the first to take up residence here, for that early species has certainly been greatly altered through the workings of evolution. In fact today nearly all the resident native birds are types that are now found nowhere else in the world. Birds such as these are called endemic; they have undergone gradual change over the millennia to become completely new forms, different from any birds found elsewhere.
Many of Hawaii’s endemic species belong to the Hawaiian honeycreeper family (Drepaniidae) and are thought to have evolved from a single bird prototype that possibly arrived here from Central or South America. Explosive bursts of evolutionary change followed, and the resulting new forms did not much resemble each other. Present day park representatives of the Hawaiian honeycreepers include the apapane, iiwi, and amakihi.
Besides the Hawaiian honeycreeper stock several other early migrants made their residence in Hawaii and evolved into endemic forms. In the park they include a Hawaiian race of the (North American) short-eared owl, the io (a hawk), the nene (a goose), the omao (a thrush), and the elepaio (an Old World flycatcher).