Pennsylvania scientists have found an extraordinary songbird that has a curious characteristic. It has half its plumage as a male and the other half as a female. Furthermore, it is quite noticeable since one part of its body is yellow while the other is pink.

Although without a blood test or an autopsy it cannot be confirmed, scientists link these characteristics to a genetic abnormality known as bilateral gynandromorphy, which has already been seen previously in some birds.

However, it cannot be considered a hermaphroditic species since instead of having reproductive tissues of both sexes, it shows contrasting sexual characteristics on each side of its body. While one side of this thick, pink-breasted bill appears genetically female, the other side shows all the characteristics of a genetic male.

These differences are also clearly identifiable on the back side of their wings, with the left side being a shade more brown and the right side being more black. Experts believe that even sex differences can affect the inside of your body too, showing different characteristics in your brain or reproductive organs.