Black Mountain dusky salamander

The Black Mountain Dusky Salamander

The Black Mountain dusky salamander, scientifically known as Desmognathus welteri, is a species of salamander native to the southern Appalachian Mountains in the southeastern United States. This species is a member of the Plethodontidae family, which are lungless salamanders.

Distribution and Habitat

This salamander is endemic to a region spanning approximately 20,000 square kilometers within the southern Appalachian Mountains. Its range encompasses parts of eastern Kentucky, southwestern Virginia, and eastern Tennessee, typically found at elevations between 300 and 1,220 meters above sea level. The Black Mountain dusky salamander thrives in wooded mountainous environments, preferring habitats such as temperate forests, rivers, freshwater marshes, and springs. It is often found concealed beneath rocks and logs in or near swift-flowing streams, pools, and wet ditches.

Physical Characteristics

One of several similar-looking dusky salamanders found in upland areas, the Black Mountain dusky salamander features a robust body that reaches about 12 cm (5 inches) in length. It possesses short, stout limbs. The coloration is variable; the upper parts are generally pale to medium brown, often with an indistinct pattern of lighter markings. The underside is typically whitish and marked with dark spots and blotches.

Reproduction and Life Cycle

While specific courtship behaviors are not well-documented, reproduction occurs in the spring or summer. A female lays clutches of approximately 25 eggs, which are attached to each other and resemble a bunch of grapes. These eggs are deposited in moist crevices or among wet leaves in the splash zone of small, fast-flowing streams. The female diligently guards and broods the eggs until they hatch. The resulting larvae are aquatic and typically inhabit the quiet, shallow sections of streams. The larval period lasts for a significant duration, between twenty and twenty-four months. Post-metamorphosis, juveniles appear to favor deeper water or spend more time on land, possibly to avoid competition or predation from cannibalistic species like the blackbelly salamander.

Diet and Behavior

The Black Mountain dusky salamander is known for its secretive nature, particularly during daylight hours, and it is believed to forage primarily at night. Its diet consists mainly of various insects, including flies and beetles, as well as the larval forms of flies, butterflies, and moths.

Conservation Status

The populations of the Black Mountain dusky salamander are reported to be stable or experiencing a slight decline, although comprehensive studies are limited. The areas where it is found are not heavily populated, and its primary habitat is not currently under significant threat. However, activities such as road building and strip mining have led to increased silting in some locales, which can negatively impact the species. In West Virginia, the salamander is considered to be rare.