Birds in the Americas are on the move every day of the year -- even in winter.
This animation by Frank La Sorte at Cornell Lab uses eBird data to show the movements of 118 species in the western hemisphere. Yes, your eBird checklists can lead to something useful and beautiful like this.
Click on the link to learn which species are on the map and how it was made in this January 2016 news from Cornell Lab: Mesmerizing Migration: Watch 118 Bird Species Migrate Across a Map of the Western Hemisphere.
(animation by Frank La Sorte/Cornell Lab of Ornithology. Click on the image to see the original)