jackdaw

…A small number of ravens (C. corax) migrate to Hokkaido as winter birds. All of these species belong to the crow genus, and although their Japanese name is "crow," in English they are called "raven," "rook," and "jackdaw." Also, birds in separate genuses that are closely related to the crow genus include the nutcracker and the red-billed crow, which are called "nutcracker" and "chough," respectively. …

*Some of the terminology that mentions "jackdaw" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…ワタリガラスC.coraxは北海道に冬鳥として少数が渡来する。これらの種はいずれもカラス属に属し，和名は〈カラス〉とつけられているが，英名ではcrowのほかに，ワタリガラスをraven，ミヤマガラスをrook，コクマルガラスをjackdawという。またカラス属に近縁で別属の鳥にホシガラスやベニバシガラスがあるが，英名はそれぞれnutcrackerとchoughである。…

※「jackdaw」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