Add Yahoo as a preferred source to see more of our stories on Google. Ruby throated hummingbird flying above purple flowers in garden. - Dansphotoart On Flickr/Getty Images With over 360 species, ...

Hummingbirds fly so quickly (and beat their wings so fast) that they need an exceptionally efficient supply of oxygen-rich blood to keep them going. But don't go thinking that such a high heart rate ...

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 ...