migratory

migratory
/ˈmaɪgrətrɪ, maɪˈgreɪtərɪ; ?@ ˈmaɪgrətɔ:rɪ;`maɪɡrəˌtɔrɪ/ adj
having or of the habit of migrating 有迁徙习惯的: migratory birds 候鸟
    the migratory instinct 迁徙的本能.

牛津英汉双解词典