Discover the top 10 largest flying birds, ranked by wingspan and weight. Learn about their habitats, flight styles, and ...

An intact, fossilized specimen of the world’s largest egg—of any known species ever on Earth—entered the National Geographic ...

This enormous bird of prey has long been extinct for some 500 years and was undoubtedly the largest eagle to have ever lived. For a time, Haast's eagle, or Harpagornis moorei, ruled the skies ...