winter bird
Refers to birds that stay in a region during winter, often migratory species that arrive in autumn and leave in spring.
A Daurian redstart, a winter bird, came to the garden.
この池には毎年たくさんの冬鳥が集まる。
Many winter birds gather at this pond every year.
Compound of 冬 (ふゆ, 'winter') and 鳥 (どり, 'bird'). The reading どり is a rendaku form of とり.