A state-endangered beach bird is getting a helping hand at Cape Henlopen State Park as Delaware environmental officials work to rebuild declining least tern populations along the coast.

The Assateague Island National Seashore and National Park Service has announced this year’s annual closure of areas on the north end of Assateague to protect nesting birds.

Some areas of Prime Hook National Wildlife Refuge’s Fowler Beach will be closing for the benefit of migratory shorebirds, the U.S. Fish & Wildlife Service (FWS) says.