Dear Sarah and Whomever;- You brought it up. I didn't! But since you did, I must explain that flying pigs (Porkus aeronauticus) are not color blind but rather di-chromus---which means they recognize only one color in addition to blacks, whites and assorted grays. But each pig recognizes a different color and a different shade of that color. Each male FP develops a wattle during mating season (Early May to late July) and each wattle is of a specific color. That is what attracts a female whose toes match the wattle color of the male. The actual mating has never been seen as it usually takes place high over a forested area during a rainstorm. I do hope this explanation adds to our scientific knowledge. Art