It started Tuesday when the language-learning app Duolingo posted that Duo the Owl, its internet-famous big green bird, was dead. “It is with heavy hearts that we inform you that Duo ...

White-necked jacobin hummingbirds are common in Central and South America. Male birds have shimmering blue and green feathers, while females tend to sport low-key green plumage. The tropical ...

The big, green, nocturnal birds used to be widespread across New Zealand, but were hunted to near extinction and threatened by non native predators like cats and dogs. Popular Science magazine ...