A Costa's Hummingbird (at least I think it is...) at the Desert Museum in Tucson, Arizona. The feathers that make up a hummingbird's gorget do not directly depend on light absorption and reflection as with most other pigmented substances. Instead, the feathers have a different refractive index than air, so when light is reflected off of them, the beautiful iridescent colors are perceived due to interference coloration. Different colors depend on different refractive indices.
Excellent shot as well!! I'm jealous you got a Costa's hummingbird photo, they're so beautiful
Ooo, the purple/indigo color is really cool!
Wow! Beautiful shot
LOVE! and he's purple, how awesome! Great composition, love the beautiful dof. You even managed to capture his expression. Nicely done!
I followed him around for quite some time to get a photo just because he was purple! He was so pretty!