Ixobrychus eurhythmus; Von Schrenck's bittern

Japanese: オオヨシゴイ（英語表記）Ixobrychus eurhythmus; Von Schrenck's bittern

Order Pelecaniformes, Family Heronidae. Total length 33-39cm. A small heron slightly larger than the common bittern. Sexes are heterochromatic. Males have a blackish head, dark chestnut back, and yellowish-gray coverts. The underside is dull white with a single black vertical line from the throat to the center of the chest. Females have many white spots on the back and coverts, and many vertical lines on the underside. They breed in southeastern Siberia to East Asia, and spend the winter from the Philippines to the islands of Indonesia. They also migrate to Japan as summer birds (→ migratory birds), breeding in grasslands and reed beds from central Honshu northward, but their numbers are smaller than those of the common bittern, and their distribution is more localized. They are listed as endangered (Class IA) in the Red Data Book of the Ministry of the Environment.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

ペリカン目サギ科。全長 33～39cm。ヨシゴイよりやや大きい小型のサギ。雌雄異色。雄は頭上が黒っぽく，背が暗栗色，雨覆は黄灰色。下面はくすんだ白色で，喉から胸の中央にかけて 1本の黒い縦線がある。雌は背と雨覆に多数の白斑があり，下面に縦線が多い。シベリア南東部から東アジアに繁殖分布し，フィリピンからインドネシアの島々に渡って越冬する。日本にも夏鳥（→渡り鳥）として渡来し，本州中部以北の草原やアシ原で繁殖するが，ヨシゴイより数が少なく，分布も局所的。環境省のレッドデータブックでは絶滅危惧IA類に指定されている。

出典　ブリタニカ国際大百科事典小項目事典ブリタニカ国際大百科事典小項目事典について　情報

<<: Large-scale tea ceremony - Ooyosechakai

>>: Acrocephalus orientalis; oriental reed warbler