The specimens gathered during an illustrious expedition by naturalist John Kirk Townsend continue to provide value to researchers
How did the ivory-billed woodpecker, which was feared extinct, hang on all these years?
The star of one of nature's most spectacular spring shows is losing ground and may be headed for the federal Endangered Species List
Scientists at the Smithsonian's Conservation and Research Center have snatched endangered creatures from the brink and redefined conservation biology
Monarchs of the mountain West, they once ranged all the way to the Eastern Seaboard. Now they are coming home
In North America, more than 60 million birds have been banded to help us learn how they live and travel
Carolina dogs, discovered in the Southeast woods, may provide clues to the primitive dogs that arrived with the first humans in America
Even hunters of timber rattlers now admit that these snakes are shy, placid and very fragile