Bugs from the Sub order Homoptera which include cicada, tree hoppers, frog hoppers, leaf hoppers, aphids, jumping plant lice, whiteflies and scale insects.
The nymphs of frog hoppers are protected from predators and wide temperature variations by spending their time inside foam on plants (commonly called 'cuckoo spit' which gives the nymph the common name of 'spittle bug'). The foam is created by the nymph puncturing the plant which releases fluid which the nymph foams up.
Frog Hopper(Neophilaenus campestris). Copyright 2009 Peter Drury
This specimen was seen on Portchester Common. A chalky grassland at the top of Portsdown Hill overlooking Portsmouth Harbour. this is not a particularly common frog hopper and, being only 5mm long, is easy to miss.