Grey-headed woodpecker (yamagera)

Japanese: ヤマゲラ(山啄木鳥) - ヤマゲラ（英語表記）grey‐headed woodpecker

A bird of the woodpecker family, Picidae. A medium-sized woodpecker with a total length of about 30 cm and a greenish tinge overall. The upperparts are dark green, the black flight feathers have white spots, and the underparts are greenish-gray. It is very similar to the Japanese green woodpecker, but its jaw line is black and it does not have the black horizontal stripes on its abdomen. The male is bright red from the forehead to the top of the head, but the female is gray. It is distributed throughout Europe and Asia, living alone in pairs in deciduous broadleaf forests in mountainous areas, and migrating to plains in winter. Its habits and ecology are also very similar to those of the Japanese green woodpecker, drilling holes in dead trees and bark with its beak to pull out insect larvae to eat, and descending to the ground to hunt for ants.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

キツツキ目キツツキ科の鳥。全長約30cm，全体に緑色がかった中型のキツツキ。上面は暗緑色で，黒い風切羽には白斑があり，下面は帯緑灰色。アオゲラによく似ているが，顎線（がくせん）が黒く，腹部に黒色の横縞がない。雄は額から頭頂部にかけて鮮紅色だが，雌は灰色である。ヨーロッパ，アジアに分布し，山地の落葉広葉樹林に単独かつがいですみ，冬には平地に移動する。習性や生態もアオゲラによく似ていて，枯木や樹皮にくちばしで穴を開けて昆虫類の幼虫を引き出して食べ，地上に降りてアリ類を好んでとる。

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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