The U.S. Fish and Wildlife Service has listed the Ozark hellbender as a federally endangered species that cannot be harmed, killed, or bought and sold as a pet.
The Ozark hellbender is found only in the streams of the White River system in southern Missouri and northern Arkansas.
Ozark hellbender populations have dropped by 75 percent since the 1980s, with fewer than 600 remaining in the wild.
Riverlands program manager Charlie Deutsch of the U.S. Army Corps of Engineers says the 3,700-acre sanctuary attracts tens of thousands of migratory birds every year.