Big Question: Why do birds fly south for the winter?

This Big Question comes from class 5 at Oasis Academy who ask, why do birds fly south for the winter?

Tom Luker works at the Natural History Museum and he has the answer.

And if you liked this, why not check out more Big Questions:

Why can't penguins fly

How many animal species are there?

If you've got your own Big Question you'd like to ask, get in touch!