羽は白じろ

noun

duck with white specula

Refers to any duck species that has white patches (specula) on the wings. A specialized bird-watching term.

• 羽は白じろは、翼つばさに白しろい斑ふがあるカモの総そう称しょうです。

  Hajiro is a general term for ducks with white patches on their wings.