A bull and a donkey have been spotted in Ethiopia that seem to be in love with each other. Researchers from the University of Pisa, Andre Byrne de Cruz and Martina Francesconi, during an expedition to Ethiopia, accidentally noticed a bull trying to mate with a donkey. They began to observe the animals and noticed a strong social bond between them. The bull and the donkey (the researchers named them Achilles and Patroclus) clearly preferred each other over the other animals in the herd. Open with VPN | No VPN.