Neonympha mitchellii is an endangered species of nymphalid butterfly of the eastern United States.

[3] All subspecies, including those newly discovered, are federally protected under the Endangered Species Act.

[6][7] A butterfly of similar appearance, the Carolina satyr (Hermeuptychia sosybius), is also able to feed upon stilt grass.

[8] Both subspecies are small brown butterflies with a wingspan rage of 34–44 mm.

[11] First instar larvae, 3–4 mm long, have dark brown bilobed heads, while four subsequent instars, 6–12 mm long, have green bilobed heads, and green bodies with raised white ridges along the sides.