If you enjoy birdwatching, you may be able to use your hobby to help protect an endangered Great Lakes shorebird. The U.S. Fish and Wildlife Service is relying on volunteers to monitor the critically endangered piping plover during its nesting season this summer, from May 1st to July 15th. Patrols have already been established in Michigan national forest and state parks, including Sleeping Bear Dunes lakeshore. Most remaining breeding pairs nest in Michigan — with the intensive patrol programs, the number of Great Lakes nesting plovers rose from 17 pairs in 1986 to 59 pairs in 2005, according to the National Park Service. But numbers have dropped in recent years: 25 pairs in 2009, 23 pairs in 2010 and 18 pairs in 2011.