They are about when their prey is, from spring on through summer. Species of this genus inhabit North Africa up to the arctic region and east incorporating the Euro-Siberian, Mediterranean, Sahara and Arabian desert regions.(Palearctic region).A few species are found in India and southern Africa. Dicyphus Hesperus is native to North America. I haven’t found any reference to them in Australia although D. hesperus is listed in Atlas of Living Australia.