The froghoppers, or the superfamily Cercopoidea, are a group of Hemipteran insects, in the suborder Auchenorrhyncha. These families are best known for the nymph stage, which produces a cover of frothed-up plant sap resembling spit; the nymphs are therefore commonly known as spittlebugs and their froth as cuckoo spit, frog spit or snake spit.
The froth serves a number of purposes. It hides the nymph from the
view of predators and parasites, it insulates against heat and cold,
thus providing thermal control and also moisture control. Without the
froth the insect would quickly dry up. The nymphs pierce plants and
suck sap causing damage, and much of the excess filtered fluids go
into the production of the froth, which has an acrid taste,
Hand held Nikon 105mm f/2.8 Macro Lens