The species that periodically migrate are called migratory, those that do not are called resident (or sedentary).
Bird migration is common. The longest known migration of a bird is that of the Arctic Tern, which migrates from the Arctic to the Antarctic and back each year. Flyways are routes that certain bird species take to migrate.
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Stifled Potential - Migrating from South Africa to New Zealand has left this person bankrupt. Seeking donations to allow him to start a new life. Requires Flash.
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