This article discusses how solar farms help bees and butterflies. A trend of planting wildflowers on solar sites could maintain habitat for disappearing bees and butterflies.
Minnesota-based Great River Energy (pdf) has also introduced pollinator-supporting plants—such as purple prairie clover and wild lupine—at several of its solar sites, as has SoCore Energy at some of its outfits in Wisconsin. In 2018 the NREL identified 1,350 square miles of land near existing and planned utility-scale solar energy facilities around the country that could be similarly converted. Although no national statistics are available, in Minnesota alone it is estimated that half of the 4,000 acres of commercial solar projects installed in 2016 and 2017 included pollinator habitat.