Why do birds migrate?
Wings on Schedule
Why do birds migrate?
Every fall, millions of birds pack up and fly thousands of miles south. They don't have suitcases or boarding passes — just wings and an ancient instruction written into their bodies. Why do they do it? Why not just stay put?
The short answer: food. When winter arrives in places like Canada or Alaska, insects vanish underground, seeds get buried in snow, and the berry bushes go bare. A bird that eats bugs all summer suddenly finds an empty restaurant. So it flies to where the restaurant is still open — like Mexico, or Central America, or even the southern tip of South America.
