Froghopper nymph (Philaenus spumarius) and cuckoo-spit on a leaf. 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.
July 24th, 2016
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