Southern Two-Lined Salamander (above) and a Red-Back Salamander. Noticeable differences include head shape, coloration, shape of tail, and length, specifically tail length. The tail of the Red-Back Salamander is at least as long, if not longer, than the rest of its body. Also, the tail of the Southern Two-Lined Salamander is paddle-like and flattened suggesting that it spends most of its life in water. The tail of the Red-Back Salamander is rounded rather than flattened, suggesting a more terrestrial lifestyle.