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Nene (bird)
The nene (''Branta sandvicensis''), also known as nēnē and Hawaiian goose, is a species of goose endemic to the Hawaiian Islands. The official bird of the state of Hawaii, the nene is exclusively found in the wild on the islands of Oahu,〔 Maui, Kauai and Hawaii.
The Hawaiian name ''nēnē'' comes from its soft call.〔 The species name ''sandvicensis'' refers to the Sandwich Islands, an old name for the Hawaiian Islands.〔
==Evolution==
It is thought that the nene evolved from the Canada goose (''Branta canadensis''), which most likely arrived on the Hawaiian islands about 500,000 years ago, shortly after the island of Hawaii was formed. This ancestor is the progenitor of the nene as well as the prehistoric Giant Hawaii goose〔 and nēnē-nui (''Branta hylobadistes''). The nēnē-nui was larger than the nene, varied from flightless to flighted depending on the individual, and inhabited the island of Maui. Similar fossil geese found on Oahu and Kauai may be of the same species. The Giant Hawaii goose was restricted to the island of Hawaii and measured in length with a mass of , making it more than four times larger than the nene. It is believed that the herbivorous Giant Hawaii goose occupied the same ecological niche as the goose-like ducks known as moa-nalo, which were not present on the Big Island.〔 Based on mitochondrial DNA found in fossils, all Hawaiian geese, living and dead, are closely related to the giant Canada goose (''B. c. maxima'') and dusky Canada goose (''B. c. occidentalis'').〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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