You’ve undoubtedly noticed in some of the photos that two of the toes (and nails) on the right foot are white. The tongue also has a white stripe on it. Apparently this is a result of the “pied gene.” It’s nothing special really however it gives the bird a couple of distinguishing marks, making it easier to identify in a crowd.
The pied gene results in decreased melanin production in spots or sometimes all over the body.