African birds called honeyguides eat beeswax. Most bees’ nests are inside hollow trees where the honeyguides cannot reach them. The honeyguides lead honey badgers, which also eat beeswax, to bees’ nests. The honey badgers then dig out and eat the nests, leaving scraps of wax and honey for the honeyguides. The relationship between the honeyguides and the honey badgers is an example of *