A migratory animal, in particular a migratory bird. / Traveller or worker who moves from one region or country to another.

Migratory.

plural of migrant

An agricultural labourer who travels from place to place harvesting seasonal crops. / A person with temporary permission to work in another country; a guest worker.

plural of migrant worker

A person who emigrates from one region to another to seek an improvement in living standards.

(ornithology) A bird that stops somewhere for a short time during a seasonal migration.

plural of passage migrant

Human smuggling, people smuggling.

plural of economic migrant