It can take years of selective breeding before the serpents come out with the perfect pumpkins, making them highly valued pets for reptile lovers. Piebald animals have a pattern of pigmented spots surrounded by unpigmented—white—areas. And it doesn’t just happen with ball pythons. More commonly, the effect is seen in horses, cattle, dogs, birds, and pigs. The underlying cause is a sort of leucism, which is a lack of pigmentation that also accounts for the pale tigers and white giraffes that have appeared lately.
[via My Modern Met]