The following are either extinct or threatened:
Plants:
Sandplain Gerardia
Small Whorled Pogonia
North-Eastern Bulrush
Animals:
American Burying Beetle
Bald Eagle
Piping Plover
Eastern Puma
Hawksbill Sea Turtle
Kemp's Ridley Sea Turtle
Leatherback Sea Turtle
Loggerhead Sea Turtle
Shortnose Sturgeon
Roseate Tern
North-Eastern Beach Tiger Beetle
Puritan Tiger Beetle
Bog turtle
Plymouth Redbelly Turtle
Dwarf Wedgemussel