 
 <prompt> Wetin we dey carry put when we wan place bet? Based on di question wey dey before, write something wey get di answer inside. E fit be 1 - 20 sentences. Context: <response>: Theoretical analyses show say detours wey dey increase flight distance by up to 20% go often make sense for aerodynamic reasons - bird wey load itself with food to cross long barrier no dey fly efficiently. But some species dey show long migratory routes wey no dey make ecological sense. For example, the migration of continental populations of Swainson's thrush Catharus ustulatus, wey dey fly far east across North America before dem turn south via Florida to reach northern South America; dem believe say dis route na because of range expansion wey happun about 10,000 years ago. Detours fit also dey caused by different wind conditions, predation risk, or other factors. 