Achatinella concavospira
CR

Achatinella concavospira

Unknown

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Achatinella_concavospira

Overview

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

Achatinella concavospira faces severe population decline primarily due to habitat destruction from urban development and invasive plant species that alter native forest composition. Introduced predators, particularly the rosy wolf snail (Euglandina rosea) and rats, have devastated remaining populations by directly consuming individuals and eggs. Climate change compounds these pressures by shifting rainfall patterns and temperature ranges that affect the cool, moist microhabitats essential for this species' survival.

Threat summary

Habitat

This endemic Hawaiian tree snail inhabits native montane forests on Oahu, specifically requiring cool, moist conditions in ohia lehua and koa forest canopies at elevations between 1,200-2,000 feet. The species depends on native vegetation for both shelter and the algae and fungi that grow on leaf surfaces, which form its primary food source.

TERRESTRIAL· major

Other threatened species in ACHATINELLIDAE

VU

Lamellidea biplicata

Unknown
VU

Lamellidea ogasawarana

Unknown
EN

Newcombia lirata

Unknown
EN

Newcombia canaliculata

Unknown

Frequently asked questions

Why is Achatinella concavospira classified as Critically Endangered?
Achatinella concavospira 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. Achatinella concavospira faces severe population decline primarily due to habitat destruction from urban development and invasive plant species that alter native forest composition. Introduced predators, particularly the rosy wolf snail (Euglandina rosea) and rats, have devastated remaining populations by directly consuming individuals and eggs. Climate change compounds these pressures by shifting rainfall patterns and temperature ranges that affect the cool, moist microhabitats essential for this species' survival.
Where does Achatinella concavospira live?
Achatinella concavospira 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 Achatinella concavospira?
The main threats to Achatinella concavospira 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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