CR

Winter Skolly

Thestor strutti

Declining

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Thestor strutti faces severe threats from habitat degradation in its restricted South African range, where agricultural expansion and urban development have fragmented the remaining fynbos vegetation. The species' specialized relationship with its ant mutualists makes it particularly vulnerable to ecosystem disruption, as changes in vegetation structure can break down the delicate ecological partnerships essential for larval survival. Climate change poses an additional threat through altered rainfall patterns that could shift the composition of host plant communities and disrupt the timing of critical life cycle events.

Threat summary

Habitat

This butterfly inhabits specialized fynbos vegetation in the Western Cape of South Africa, particularly areas with specific host plants and the presence of mutualistic ant species. The species requires intact, undisturbed fynbos ecosystems where the complex relationships between butterflies, host plants, and ants can be maintained.

Shrubland· majorRocky areas· major

Frequently asked questions

Why is Winter Skolly classified as Critically Endangered?
Winter Skolly is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Thestor strutti faces severe threats from habitat degradation in its restricted South African range, where agricultural expansion and urban development have fragmented the remaining fynbos vegetation. The species' specialized relationship with its ant mutualists makes it particularly vulnerable to ecosystem disruption, as changes in vegetation structure can break down the delicate ecological partnerships essential for larval survival. Climate change poses an additional threat through altered rainfall patterns that could shift the composition of host plant communities and disrupt the timing of critical life cycle events.
Where does Winter Skolly live?
Winter Skolly occurs in South Africa. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Winter Skolly?
The main threats to Winter Skolly are 11.2, 2.2, 8.1, and ai-1. The full IUCN-classified threat record for this species is detailed on the species page.

Get weekly conservation intelligence

One short digest a week of the most striking species and country data we ship, plus breaking conservation news paired with our database where it matters.

Free, no spam. One-click unsubscribe in every email.