Illumination's Migration ends on a high note, with the characters challenging what they once firmly believed to be true. The animated adventure-comedy follows the story of a family of mallard ducks who have lived in the safety of their own pond all of their lives. They are content with this until they meet another family in the process of migrating and decide to embark on a journey of their own. This journey ends up being anything but simple, as they find themselves heading the wrong way and ending up in New York City.

https://screenrant.com/migration-ending-explained/