red-billed oxpeckers buphagus erythrorhynchus sitting on the black back of african buffalo or cape buffalo syncerus caffer

africa african aggressive animal animals back big black botswana bovine brown buffalo bull buphagus cafer caffer cape chobe close dangerous erythrorhynchus five game grass horn horns kruger lake large male mammal national natural nature oxpeckers park redbilled safari sitting south symcerus syncerus water wild wildlife zimbabwe