(Charlie Neibergall | The Associated Press) In this Jan 11, 2009, file picture, a bald eagle flies over the Des Moines River near Pella, Iowa. Greg Sheehan, the head of the U.S. Fish and Wildlife Service, is stepping down after a 14-month tenure in which he proposed broad changes to rules governing protections for thousands of plant and animal species. Spokesman Gavin Shire said Thursday, Aug. 9, 2018, that Sheehan will step down next week to return to his family and home in Utah.