The condition or behavior of migrating twice in a lifetime; moving between two habitats or locations twice.
From Greek 'di-' (two) + 'dromos' (running, course, or journey), forming a biological term describing organisms with two distinct migratory periods.
Didromy is an evolutionary strategy where organisms spend parts of their life in completely different environments—salmon exhibiting didromy have two entirely separate lives in freshwater and ocean.
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