Common and Red-breasted Mergansers swim in the Straits of Mackinac, April 13, 2018. Wildlife professionals from the U.S. Department of Agriculture Animal and Plant Health Inspection Service (USDA-APHIS) Wildlife Services program have been conducting wildlife surveillance to ensure birds and wildlife have not been impacted from the mineral oil release in the Straits of Mackinac. To date, no impacts have been observed. (U.S. Department of Agriculture photo by Dustin Arsnoe).