Where did the elm seed bug come from?

The elm seed bug (Arocatus melanocephalus) is native to Europe and parts of Asia. It was first identified in North America in the early 2000s, likely arriving through international trade or travel. Since then, it has spread across various regions, particularly in the northeastern United States and Canada, where it has adapted to local environments. The bug primarily feeds on elm seeds, which has contributed to its establishment in areas with elm trees.