no no you don't get it. unlike other birds, it's not caused by a pigment but by the structure of the feather itself. If you had like a bleach or something that affects the pigments but not the feather structure, and applied it to a blue jay feather, the feather would still be blue. Idk how else to explain it man, but it's a really big thing that it's not the structure of pigment but of the feather itself that makes it blue.
So basically like how polar bear fur is technically colorless, but the hollow hairs reflect or compound or something the light to appear white? But I figured the person is more pointing out that regardless of the specific cause, if something appears a color any time light touches it, it is that color to us (kinda like how you can SAY magenta “isn’t real” but things are still magenta to us). The structure thing is neat though!
lol i got so caught up in explaining why blue jay feathers are special i forgot to agree, but yes, they are blue. arguably, they're more blue than the i think one animal that has a true blue pigment(a species of butterfly. blue pigment is incredibly rare in animals.)
Some lobsters are blue because they hijack the red pigment astaxanthin to make a new pigment, crustacyanin, which shifts the color range to blue. It’s funky






