this rose-breasted grosbeak was banded by powdermill bird banding during the fall of 2005, during a random wild bird banding of the area. participants were surprised to find the bird to be a bilateral gyandromorph - one side of the body is male, the other female. this is typically due to an event that happens in early mitosis, where one of the dividing cells does not split its sex chromosomes in a typical fashion. interestingly, most birds only have one functional ovary on the left side of the body, so this individual could still hypothetically produce offspring.

















