The small dusty wave (Idaea seriata) is a moth of the family Geometridae. It is found throughout Europe, the Near East, and North Africa. In the British Isles it is common in England and Wales but is only found in the eastern half of Scotland and is absent from Ireland. The larva feeds on ivy and the species overwinters in this form. 1. \n* The flight season refers to the British Isles. This may vary in other parts of the range.