Aphrophora alni, the 'European Alder Spittle Bug', is a species belonging to the family Aphrophoridae. This large 'froghopper' is quite common and widespread. It is present in most of Europe, in eastern Palearctic ecozone, in the Near East and in North Africa. The basic coloration of the body is usually brown. Their front wings wear two distinct clear patches on the margins. Head and pronotum have a median keel. The head has a pair of compound eyes and two simple eyes (ocelli). The legs are strongly developed and fit to jump. Tibiae of the rear pair of legs carry several spines.