crag martin

短语

词形变化

crag martins 复数 crag martins

释义与例句

n.
  1. 1.

    Any of four species of passerine birds in the Ptyonoprogne genus of the swallow family, including the Eurasian crag martin (Ptyonoprogne rupestris) and the rock martin (Ptyonoprogne fuligula).