What is Leucism?

What is leucism? Pronounced like ‘lew-sism’, this term refers to a lesser amount of pigmentation, or color, in the skin, fur, feathers, or scales of an animal.
Two of our Zoo’s peahens happen to be leucistic, and are mostly white with spots of brown. You can see how different this looks from a peahen with full color who is mostly a dusty brown!