How Do Birds Navigate Across Continents?

Birds are master travelers. When they fly south for the winter, they use a built-in superpower to know exactly where they are going.

Think of the Earth as having invisible lines like the wires in your house. Birds can feel these lines with a special kind of vision. It is like seeing the map in their eyes! They also look at the sun during the day and stars at night to help them point the right way.

Some birds are like sniffing dogs when they fly. They remember what the air smells like over different places. If the smell matches a place from last year, they know it is time to go home or stay put.