Authorities are seeking information on who was responsible for vandalizing two piping plovers nests at Gateway National Recreation Area, where eggs inside two nests were stolen earlier this month.

Spotting piping plover nests, eggs, and even fledglings on a sandy beach can be difficult to do, as Theresa Conn discovered during her summer with the Student Conservation Association. That's why it's so important to protect the threatened shorebirds.

The Ranger III, the National Park Service ship that brings visitors to Isle Royale National Park, has been outfitted with a water ballast treatment system that is designed to prevent invasive species from hitching a ride.

The body of a hiker missing in Theodore Roosevelt National Park since Sunday has been found.