[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Did Feathers Evolve for Dispaly? We Still Don't Know!

 I've heard that zoos need to mix certain natural dyes into their
 flamingo food, otherwise the birds turn white.

Yes, and those are carotenoids (such as beta-carotene, which is the dye of carrots, and vitamin A, the same molecule split in half).