The phenomenon has been observed in less than ten birds since Powdermill's Avian Research Center began bird banding 64 years ago. 'The entire banding team was very excited to see such a rarity up ...

The bird appeared to be a bilateral gynandromorph: female on one side and male on the other. “It was just incredible,” Prof Spencer said. “We were lucky to see it.” ...

Mutant bird 'that's half male and half female' is photographed in Colombia - in one-in-100-year event A 'gynandromorph' is an animal that has both male and female characteristics ...

Trilobites This Bird Is Half Male, Half Female, and Completely Stunning A green honeycreeper spotted on a farm in Colombia exhibits a rare biological phenomenon known as bilateral gynandromorphism.