A cicada Aphrophora alni [1] on Meadowsweet (Filipendula ulmaria), an important food- and host plant of the species [2].
Literature
1 Nederlands Soortenregister2 HALKKA, Olli, et al. Coexistence of four species of spittle-producing Homoptera. In: Annales Zoologici Fennici. SOCIETAS BIOLOGICA FENNICA VANAMO, 1977. p. 228-231.
