| Adult monarchs can live on nectar alone, but hummingbirds need other kinds of food to survive and migrate. What tasty treats do you think this hummer's beak could get at? Hint: Using high-speed video, scientists have discovered what they couldn't easily see with their eyes alone. The lower part of a hummingbird's beak can actually bend down. This allows its mouth to open wider. What fuel do you think it can get this way?  Photo:
Martin Dollenkamp |