You pay attention, I like that!
Actually had to flash that nigger in the filtered pic because he was so dark. Hence the shadow is brightened. The cheap polarizer eats almost 2 stops of light, would have been too shaky or noisy otherwise
Host will try to make a better pic with tripod and exactly the same conditions, also of some feathers with structural colors and a mirror for comparison. There's yet more to show, you'll like it.
But this is just hobby not work. Wish I could show you some awesome tech stuff from there but then you could easily dox us so nope sorry.