Aristotle's final theory is more reasonable, similar to the transfer of reality.

Aristotle’s final theory was much more reasonable, and resembled something like realistic migration. However, this idea was also taken to extremes. In 1666, the leading migration advocate was convinced that each winter, birds flew to the moon. It might seem strange that prominent researchers considered such bizarre ideas. But to be fair, the true story of migration may be even harder to believe than their wildest theories. Roughly 20% of all bird species migrate each year, following warm weather and fresh food around the planet.