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Aphrophoridae, Cercopoidea

Froghopper with widespread UK distribution.

Also known as the Alder Spittlebug

This is one of several similarly-patterned, large froghoppers, but probably the most common and widespread of the Aphrophora genus. Found across the UK on a wide range of trees and bushes.

Distribution records as at May 2019

Distinguishing features

Aphrophora alni has a large, compact body shape. Adults are 9 - 10mm long and can typically be seen between May and October.


As is typical with froghoppers, they have two stout spines on the outer edge of the hind tibia, as well as several smaller spines at the tip.

The Aphrophora genus can be recognised by the keel running down the midline of the head and pronotum, and the particular species by the colour pattern.


The base colour of Aphrophora alni is greyish yellow, and there are distinct white patches at the margin of the wings (although these can be confused with similarly-coloured variants of Philaenus spumarius. In this case note that Philaenus does not have the raised keel on the midline of the head).