The smallest hummingbird in the world is as long as a toothpick and weighs less than a cube of sugar. At just over two inches long and weighing a mere two grams, the bee hummingbird (Mellisuga helenae ...

The wings of the world's tiniest birds are a near-invisible blur as they whizz around tourists visiting a private Cuban garden that has become a haven for the declining species. The bee hummingbird, ...