Eurycea cirrigera

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Southern Two lined salamander

Eurycea cirrigera (Southern Two-Lined Salamander)

Taxonomy

  • Kingdom: Animalia
  • Phylum: Chordata
  • Class: Amphibia
  • Order: Urodela
  • Family: Plethodontidae
  • Genus: Eurycea
  • Species: Eurycea cirrigera

Common Names by Region

  • Southern Two-Lined Salamander (United States)
  • Yellow Two-Lined Salamander

Description

  • Size: Typically 2.5–4.5 inches (6.4–11.4 cm) in length.
  • Coloration: Yellow to tan body with two distinct black lines running down the length of the dorsum from the head to the tail.
  • Body Structure: Slender, elongated body with short limbs and a long tail.
  • Skin: Moist and smooth, as it is a lungless salamander relying on cutaneous respiration.

Habitat & Range

  • Native Range: Found throughout the southeastern United States, including parts of Virginia, Kentucky, Tennessee, North Carolina, South Carolina, Georgia, Alabama, Mississippi, and Louisiana.
  • Preferred Habitat: Small streams, seeps, and moist forested areas with leaf litter and rocks for shelter. Commonly found in riparian zones.
  • Microhabitat: Typically hidden under rocks, logs, and within leaf litter near streams and seeps. Larvae develop in aquatic environments before metamorphosing into terrestrial adults.

Diet & Feeding Behavior

  • Diet: Carnivorous, primarily feeding on small invertebrates such as insects, worms, and crustaceans.
  • Hunting Behavior: Ambush predator; waits for prey to come close before striking with its sticky tongue.

Reproduction & Lifecycle

  • Breeding Season: Late fall to early spring.
  • Egg Laying: Females lay eggs in submerged areas near or within streams.
  • Larval Stage: Aquatic larvae develop external gills and remain in the water for several months before metamorphosis.
  • Metamorphosis: Transformation into a terrestrial adult occurs within 2-3 months to a year, depending on environmental conditions.

Behavior & Adaptations

  • Respiration: Lungless; relies on cutaneous (skin-based) respiration, requiring a consistently moist environment.
  • Activity: Nocturnal and secretive, usually active during humid conditions.
  • Defense Mechanisms: Secretes a mild toxin from its skin to deter predators; relies on camouflage and hiding for protection.

Conservation Status & Threats

  • IUCN Status: Least Concern (LC)
  • Threats:
    • Habitat destruction due to urbanization and deforestation.
    • Pollution in freshwater ecosystems.
    • Climate change affecting moisture levels in its habitat.

Ecological Role

  • Predatory Impact: Helps control insect populations in riparian and forested environments.
  • Prey for Other Species: Important food source for birds, snakes, and larger amphibians.
  • Indicator Species: Sensitive to environmental changes, making it a useful bioindicator for ecosystem health.

Additional Notes

  • Special Features: Males develop cirri (small fleshy projections) on their upper lips during breeding season, which may play a role in chemical communication.
  • Maintenance Level: Low, as it requires a stable, moist ecosystem without human disturbance.
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