red-billed oxpecker african bird on cape buffalo at serengeti national park in tanzania, east africa

africa african beneficial benefit between billed bird buffalo buphagidae cape cattle different east eating eye feeding fur hair hitch infested insect interaction lipstick livestock living mammal national native nest oxpecker parasite park passerine pecking perch perching pick plucked plucking pulling red relationship savannah serengeti skin symbiotic tanzania tick tickbird yellow