CR

Amastra spirizona

Unknown

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.

Threat summary

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.

TERRESTRIAL· major

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EN

Leptachatina lepida

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CR

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Laminella sanguinea

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Frequently asked questions

Why is Amastra spirizona classified as Critically Endangered?
Amastra spirizona 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. 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.
Where does Amastra spirizona live?
Amastra spirizona occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Amastra spirizona?
The main threats to Amastra spirizona are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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