Learn what a Calliope hummingbird looks like, where to find these tiny birds in the U.S., and how to attract them.

All you need now are the hummingbirds. While you wait, check out these stunning hummingbird photos. Two Green Violet-ear Hummingbirds in Costa Rica. A Ruby-throated Hummingbird in flight.

For birds the size of hummingbirds to survive 15-degree weather is likely nothing short of amazing to many people, but in ...