A recent study from the University of Saskatchewan concluded that imidacloprid (neonicotinoid) and chlorpyrifos (organophosphate), two of the most widely used insecticides worldwide, pose a serious risk to the migratory ability of wild songbirds. This result could have major implications for regulation decisions of these pesticides.
More information: Margaret L. Eng et al. Imidacloprid and chlorpyrifos insecticides impair migratory ability in a seed-eating songbird, Scientific Reports (2017). DOI: 10.1038/s41598-017-15446-x