U.S. Fish and Wildlife Service. 2011. “Endangered and Threatened Wildlife and Plants; 90-Day Finding on a Petition to List the Golden-winged Warbler as Endangered or Threatened.” Federal Register 76(106): 31920–31926. https://www.fws.gov/midwest/es/soc/birds/GoldenWingedWarbler/FR90DAyFinding_GWWA.pdf