• The Eggplant horned treehopper is also known as ‘cow bug’ owing to the horn-like structure that protrudes from it. Kids, especially little boys in villages, love to play with it since they find it a fun exercise to see it leap at the flick of a finger. The insect shares a symbiotic relationship with ants. Plant sap is an important food source for the latter, which, they are unable to digest directly. These treehoppers do this for them, and exude the digested sap in the form of a simple sugary substance called honeydew. As a result, ants can usually be found near these insects, feeding. Ants in turn protect them from predators and sometimes, microscopic young ones of the treehoppers will even be watched over by ant ‘guardians’. Source: Naturalist ‘Poochi’ Venkat