On the Wing

Endurance athlete, feather-weight fighter, acrobat: all describe the Ruby-throated Hummingbird, smallest member of eastern North America’s avifauna and the only hummer to breed in western Pennsylvania. If you could hold one of these tiny birds to your ear, you’d hear a heart beating 250 times a minute—at rest. That rate rockets to some 1,200 beats …

The Hummingbird is a Powerhouse Read More »