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 ...

How fast do hummingbirds fly? Hummingbird wing speed varies depending on the species. The smaller the hummingbird, the faster it flaps its wings. Ruby-throated hummingbird wings beat about 50 times a ...

In other words, while they may be some of the smallest birds in the Americas, they are undeniably some of the most intriguing. So, whether you have hummingbirds in your yard and want to know more ...