Spotted-wing drosophila (Drosophila suzukii) is native to Asia but has emerged as an invasive pest in North America as well as South America and Europe in recent years. It is a particularly pernicious pest because it is attracted to not-quite-ripe or ripe fruit, and it uses a serrated ovipositor, shown here, to tear the fruit open and deposit its eggs. (Photo courtesy of Heather Leach)