An orangutan in Indonesia has been spotted treating a wound with a medicinal plant, the first time the behaviour has been seen in a wild animal, German researchers have revealed. Biologists from the Max Planck Institute of Animal Behavior in Germany and Universitas Nasional in Indonesia observed a male Sumatran orangutan, called Rakus, who had sustained a facial wound. Rakus was observed eating, and then repeatedly applying, sap from a climbing plant with anti-inflammatory and pain-relieving properties commonly used in traditional medicine, to his wound. He also covered the entire wound with t…