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.

Hummingbirds are fascinating little birds found all over the Americas. They are known for their beautiful colors, aerial acrobatics, and lightning-fast speeds. But did you know that hummingbirds can ...