Westraltrachia alterna
Overview
A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.
Westraltrachia alterna faces significant pressure from habitat fragmentation and degradation across its limited range in southwestern Western Australia. Urban development and agricultural expansion have reduced and isolated suitable habitat patches, while altered fire regimes and invasive plant species further compromise the quality of remaining native vegetation. Climate change poses an additional threat through increased drought frequency and temperature extremes that affect the moisture-dependent microhabitats this terrestrial gastropod requires.
Habitat
This terrestrial snail inhabits native shrublands and woodlands in the Mediterranean climate zone of southwestern Western Australia, particularly areas with dense leaf litter and fallen logs that provide essential moisture retention. It requires specific microhabitat conditions including adequate ground cover and organic matter for shelter and feeding.
