While immigration means for an individual or a family to move to a new country from their country of origin with due formalities at the embassy, the word migration denotes the act of moving from one place to another - within a country or across borders, for people or birds, and usually refers not to a single individual or family but a a larger demographic.
In other words, you "migrate from" a place and "immigrate to" another.
|Relative Relocation||Inbound movement of a migration process||Indistint relocation of any species from one place to another.|
edit Differences in meaning
- While immigration refers to relocation to a country, migration refers to the movement from one region to another - either within a country or across national borders. For example,
- There was a migration of Jews from Europe to various parts of the world.
- Albert Einstein immigrated to the United States.
- Kashmiri pundits are being forced to migrate from Kashmir to other parts of India.
- While immigration usually refers to an individual or a family, migration refers to the movement of a much larger population.
- While immigration refers to people, the word migration can also be used in the context of animals and birds.
edit Political Context
Immigration is a hot-button issue in developed countries such as the United States, UK and France. Migration, on the other hand, is a topic of anthropological interest. There are times when migration of a population set to another country sets off political strife owing resistance from the native population, a struggle for resources, or backlash from the native labor pool in a struggle for jobs or other resources.
"Immigration vs Migration." Diffen.com. Diffen LLC, n.d. Web. 2 Oct 2014. < http://www.diffen.com/difference/Immigration_vs_Migration >