The natural world has many amazing attributes, but this color-changing hummingbird is surely one of the most beautiful marvels of nature there is. In hummingbirds, color-producing pigment platelets are closely packet into a mosaic surface, and eight to ten such layers are then tightly stacked on top of one another. This tends to intensify and purify the resulting spectral color, which is why hummingbirds have the most intensively iridescent feathers in the bird world.

All this hummingbird has to do is move his head and he instantly changes color!