D.I.Joe's Collection › Birds of Brazil and Mexico › Ruby-topaz Hummingbird?

Ruby-topaz Hummingbird

The brilliant, shifting color on a hummingbird's throat and crown is not pigment at all. It comes from the microscopic structure of the feathers themselves, refracting light the way a soap bubble does, which is why the same bird can look dull one moment and blazing the next.