Hummingbirds are some of the most interesting and unique birds in the Americas. And while you may consider yourself lucky if ...

Small but speedy. Tiny but aggressive. Little bodies, big appetites. Hummingbirds are a study in extremes. They are the lightest North American birds. Most weigh less than two pennies at 3 to 4 grams.

To our eyes, they often are a blur. But high-speed cameras show us what makes these birds perfect flying machines.