...On the other hand, some species were once abundant but have become extinct. A typical example would be the passenger pigeon (illustration), whose flocks numbered several million and inhabited North America until the 19th century. The subfamily of the green-pigeons includes the genus Treron , the genus Ptilinopus , and the genus Ducula . They are beautiful pigeons found in subtropical and tropical regions, with green, yellow, or red feathers. They all live in trees and feed mainly on fruits and berries. ... *Some of the terminology that mentions "Treron" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…一方,かつてはたくさんいたのに絶滅したものもあり,その代表的な例は19世紀まで数百万の大群が北アメリカに生息していたリョコウバト(イラスト)であろう。 アオバト亜科はアオバト属Treron,ヒメアオバト属Ptilinopus,ミカドバト属Duculaなどが代表的なもので,亜熱帯,熱帯に分布し,緑色や黄色や紅色の羽毛をもつ美しいハトである。みな樹上生で,主として果実と漿果を食べる。… ※「Treron」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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