human
I've heard that a hummingbird's wing is transparent. How can that be?
assistant
That’s right! The wings of the hummingbird are so thin and delicate that they are nearly invisible to the human eye. They are made up of tiny, overlapping feathers called lamellae, which are arranged in an intricate pattern on each wing. These feathers are so light and airy that they allow the hummingbird to fly at incredible speeds without creating much resistance or drag.