Add Yahoo as a preferred source to see more of our stories on Google. Hummingbirds have one of the highest metabolic rates of any vertebrate. They are the only birds capable of sustained backward ...

Hummingbirds are unique among birds for numerous reasons, and that also includes their backward flying capability. Like almost every other bird species, they can do it all: hover, fly upside down and ...

Do you know there are something like 11,000 different bird species sharing the planet with us? On one end, we’ve got the common ostrich, an absolute unit of a bird that stands nearly nine feet tall ...