It’s about 3 inches long and weighs as much as a penny. But a calliope hummingbird is a tough little bird. It can fly up to 5,600 miles in a year. Despite its tiny stature, the smallest bird native to ...

Scientists once believed birds relied only on flight, talons and socialization for survival. But this one proves otherwise: it uses chemistry. For most of modern biology, there was a widely accepted ...

The Bee Hummingbird (Mellisuga helenae) is the smallest bird in the world by both length and weight, measuring only 5.5 cm (2.2 inches) in length and mass, equal to less than a dime, males being 1.95 ...