Symbiotic relationships are plenty in the natural world! But none as sappy and sugary as the mutualistic relationship between ants and aphids. Aphids are tiny, sap-sucking insects that are serious plant pests. They secrete a sugar-rich liquid called honeydew, a favourite food of ants! So much so that the ants protect these insects from other predators and even shepherd them to the healthiest parts of the plant to maintain a steady stream of sweet honeydew!