Amastra spirizona
Overview
A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.
Amastra spirizona faces severe population decline primarily due to habitat destruction from urban development and agricultural conversion across its limited Hawaiian range. Introduced predatory species, particularly the rosy wolf snail and various ant species, have devastated native snail populations throughout the Hawaiian Islands. The species' extremely restricted distribution makes it highly vulnerable to localized extinction events, while climate change threatens to alter the moisture-dependent forest ecosystems essential for its survival.
Habitat
This endemic Hawaiian land snail inhabits native mesic and wet forests, typically found on native vegetation in areas with consistent moisture levels. The species requires specific microhabitat conditions including adequate leaf litter and native plant communities that maintain proper humidity for survival and reproduction.