Karen Oberhauser, professor emeritus in entomology with the University of Wisconsin-Madison, told “Wisconsin Today” this data on insecticides is “exciting” because it measures the impact humans have on monarchs and other species.
“A lot of people come up to me and say, they’re just not seeing as many monarch butterflies as they have in the past,” she said. “(This study) is really our ability to dig into the data and think about the changing practices in agriculture.”