Achatinella bellula
CR

Achatinella bellula

Unknown

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

Overview

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

Achatinella bellula 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), have devastated populations by directly preying on these endemic Hawaiian tree snails. Climate change compounds these threats by altering moisture regimes essential for their survival, while the species' extremely limited range on Oahu makes it vulnerable to any localized disturbance.

Threat summary

Habitat

This species inhabits native montane wet forests on the island of Oahu, Hawaii, typically found on native trees and shrubs in areas with high humidity and consistent moisture. It requires intact native forest canopy and is particularly associated with ohia lehua (Metrosideros polymorpha) and other endemic Hawaiian plants.

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 bellula classified as Critically Endangered?
Achatinella bellula 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 bellula 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), have devastated populations by directly preying on these endemic Hawaiian tree snails. Climate change compounds these threats by altering moisture regimes essential for their survival, while the species' extremely limited range on Oahu makes it vulnerable to any localized disturbance.
Where does Achatinella bellula live?
Achatinella bellula 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 bellula?
The main threats to Achatinella bellula 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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