(of birds, etc) Migrating. / Roving; wandering; nomadic.

The condition of being migratory

migratory

Alternative form of nonmigratory

A bird that moves from one area of the world to another according to the season, usually from north to south and vice versa.

plural of migratory bird

(ornithology, zoology) Anxious behaviour in migratory animals, especially in birds, experienced at the beginning of the normal migration period; zugunruhe.