Feathered Marvels

From the discovery of the fossil Archaeopteryx to more than 10,000 different documented species today, birds have become the second most diversified class of vertebrates on Earth. Birds have evolved extensively since they first emerged in prehistoric times--but that diversity could dwindle and even vanish unless we take steps to conserve their habitats, ensuring that they sustain their numbers and their variety. This natural history of birds starts in the distant past--going back to the Jurassic