Environmentalists and farmers were relieved to discover that the mysterious and sudden drop in bee populations in the past decade turned out to be linked to neonicotinoids, a class of insecticides that are chemically akin to nicotine. Solving that mystery was not merely important to ecologists, but also crucial to human survival: if major bee communities become extinct or near-extinct, it could devastate human food sources. 

Yet as history shows, pesticides applied to kill one type of pest don’t generally stay confined to those animals. (See also: DDT.) Horrifyingly but perhaps unsurprisingly, scientists now believe that bees aren’t the only animals that are adversely affected by neonicotinoids. Many bird species, too, appear to be in decline as a result of neonicotinoids trickling up through the food chain. 

According to a new research paper published in Nature Sustainability, rising use of neonicotinoids led to a drop in bird biodiversity in the United States between 2008 and 2014, scientists say. While bird populations have been […]