 After the first skin change the larvae feed on the leaves of "Acer" (Japan), "Betula" (British Isles, Finland, Japan), "Carpinus" (Japan), "Castanea" (Japan), "Castanea crenata" (Japan), "Cornus" (Japan), "Corylus" (British Isles, Japan), "Corylus avellana" (Finland), "Fagus" (British Isles) "Juglans regia" (Europe), "Malus" (Japan), "Malus pumila" (Finland), "Prunus" (Japan), "Pterocarya" (Japan), "Quercus" (British Isles, Japan), "Quercus acutissima" (Japan), "Quercus mongolica" (Japan), "Quercus serrata" (Japan), "Salix" (Japan), "Salix caprea" (Finland), "Sorbus aucuparia" (Finland), "Tilia" (Japan), "Tilia cordata" (Finland), "Wisteria" (Japan) "Zelkova" (Japan).During the following instars the caterpillar develops even more of an odd appearance with "a large head, (the) long thoracic legs, raised humps on the fourth to seventh segments and a greatly swollen anal segment that has the claspers modified into long thin structures".The general colour is reddish brown and if in its resting position provides perfect cryptic camouflage.