But which bird is the biggest? Well, it depends on what you mean by big! When considering the "biggest" bird species, different measurements can be used, such as wingspan, height, or weight.

There are over 10,000 species of birds in the world. Some, like the bumblebee hummingbird, are very small. Others, like the ...

An intact, fossilized specimen of the world’s largest egg—of any known species ever on Earth—entered the National Geographic Society's collection in 1967. The elephant bird belongs to a ...