Dr. Universe: How do birds know where to migrate?
jstewardThere are all kinds of different birds on our planet, and they migrate to different places.
My friend Heather Watts, a researcher at Washington State University, is really curious about bird migration and told me more about how birds know where to go.
She said there are some birds that make a round-trip flight when they migrate. For instance, the bar-tailed godwit will make long flights between Alaska and New Zealand, traveling more than » More …