plural of internal migration

plural of interregional migration

(US, historical) The movement of six million African Americans out of the rural Southern United States to the urban Northeast, Midwest and West that occurred in the 20th century.

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

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

In a migratory manner.

The condition of being migratory

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