Dickson's Hillside Brown
Stygionympha dicksoni
Overview
Stygionympha dicksoni, or Dickson's hillside brown, is a butterfly of the family Nymphalidae. It is found in South Africa, in the south-western part of the Western Cape. It was also found at the Tygerberg, but is now extirpated from there.
Stygionympha dicksoni faces severe threats from groundwater extraction and aquifer depletion, which directly impacts the water table levels essential for its survival in underground cave systems. Urban development and agricultural intensification in the surrounding landscape have altered natural drainage patterns, reducing water infiltration into the cave environment. The species' extremely limited distribution makes it particularly vulnerable to localized disturbances, with any significant change to its cave habitat potentially causing population collapse.
Habitat
Stygionympha dicksoni inhabits underground cave systems and associated groundwater environments, specifically adapted to the stable, dark conditions of subterranean aquatic habitats. The species is endemic to limestone cave networks where it depends on consistent water levels and the specialized ecosystem of underground streams and pools.
Conservation measures underway
Other threatened species in NYMPHALIDAE
Threatened in South Africa
Frequently asked questions
Why is Dickson's Hillside Brown classified as Critically Endangered?
Where does Dickson's Hillside Brown live?
What are the main threats to Dickson's Hillside Brown?
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