Ipsilon Dart Moth Agrotis ipsilon

The scientific name of this moth comes with a visual clue built right in: distinctive black markings on its forewings trace the shape of the Greek letter upsilon (υ), a natural barcode that inspired the species name. But it's the larvae that cause the real trouble. Called cutworms, they don't just eat plants — they slice through stems at soil level, toppling seedlings like tiny lumberjacks.

Found on every major continent, this is one of the most cosmopolitan pest moths in existence, attacking nearly all vegetables and many important grain crops. Adults are also powerful migrants, capable of riding wind currents hundreds of miles to infest new territory — a dispersal ability that makes containment genuinely difficult.