BOB GIBBONS / SCIENCE PHOTO LIBRARY BOB GIBBONS / SCIENCE PHOTO LIBRARY
Cuckoo-spit on wild clary (Salvia verbenaca) plant. Cuckoo-spit (froghopper nymphs) on clary, Salvia verbenaca. Cuckoo-spit consists of frothed plant sap, produced by the nymph stage of the froghopper (superfamily Cercopoidea), a jumping insect. The froth protects the nymphs from predators, prevents them from drying out, and insulates them against temperature changes. Photographed in France.
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