Piebald: A piebald animal is one that has a spotting pattern of large unpigmented, usually white, areas of hair, and normally pigmented patches, generally black. The color of the animal's skin underneath its coat is also pigmented under the dark patches and unpigmented under the white patches. This alternating color pattern is irregular and asymmetrical. Some animals also exhibit coloration of the irises of the eye that match the surrounding skin (blue eyes for pink skin, brown for dark). Blue eyes have not been seen in sugar gliders to date. The underlying genetic cause is related to a condition known as leucism.