Northern cardinals, blue jays, American robins, and house sparrows are common birds throughout city life. These small, ...

The natural marvels, which do everything from enabling acrobatic flight to insulating against Antarctic cold, continue to ...

There are thousands of species of birds, and many of their names are well-known to us—blue jay, robin, and mallard, to name ...

Unlike birds whose plumage is mostly blue, the green coloring of a green bird‘s feathers is the result of pigment, not a ...