Lucas Bustamante / Treehopper (Alchisme onorei) with eggs Papallacta, Napo, Ecuador

John Cancalosi / Thornbugs or Treehoppers, Costa Rica

Nick Upton / Horned treehopper / Thorn-hopper (Centrotus cornutus) on nettle stem at the edge of a meadow, Wiltshire, UK, May.

Nick Upton / Horned treehopper / Thorn-hopper (Centrotus cornutus) on nettle stem at the edge of a meadow, Wiltshire, UK, May.

Paul Bertner / Treehopper (Membracidae) group with mite stealing honeydew, Yotoco, Colombia

Paul Bertner / Treehopper (Membracidae) group with mite stealing honeydew, Yotoco, Colombia

Paul Bertner / Treehopper (Membracidae) guarded by Ant (Formicidae), Andasibe-Mantadia National Park, Madagascar

Paul Bertner / Treehopper (Membracidae), Mindo Cloud Forest, Ecuador

Lucas Bustamante / Treehopper (Alchisme grossa) Mindo, Pichincha, Ecuador.

Paul Bertner / Treehopper (Membracis sp), Mindo, Ecuador

Paul Bertner / Green Tree Ant (Oecophylla smaragdina) guarding treehopper, Angkor Wat, Cambodia

Paul Bertner / Green Tree Ant (Oecophylla smaragdina) pair exchanging food harvested from treehopper, Angkor Wat, Cambodia