The most common arthropod morphs in the SwAsp common garden at Sävar (63°54′N), expressed as the maximum percentage of the trees in the garden affected by each species.

Specialist species are those known to feed/oviposit on only Populus, generalists on more than one genus. The one leaf-tying species was classified with the most-related guild, leaf-rollers, for the analysis. All arthropods construct obvious, fixed leaf structures unless indicated by §, in which case the species is free living throughout its life cycle.