California condor

California condors are the largest birds in North America. Like all vultures, condors are carrion-eaters. This means that they feed only on dead animals they find. They can soar as high as 15,000 feet in the air, and they glide for hours without flapping their wings on hot air currents called thermals. Scientists are working hard to save these endangered birds of the sky.

Image credits: main image, courtesy of David Clendenen, U.S. Fish and Wildlife Service.