Bird migration in the Americas, Internet map

This video is about bird migration.

Frpm the Cornell Lab of Ornithology in the USA, about bird migration in the Americas:

Watch a Mesmerizing Migration Map

Watch the wonder and spectacle of bird migration captured on a single map. Using millions of bird observations from participants in eBird and the Great Backyard Bird Count, scientists at the Cornell Lab generated an animated map showing the annual journeys of 118 bird species. Watch how the routes change in spring and fall as birds ride seasonal winds to their international destinations. See the map in motion and read more.

Want to know which species is which? Check out the numbered key.