CR

Achatinella viridans

Unknown

Overview

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

Achatinella viridans faces severe population decline primarily due to predation by introduced species, particularly the rosy wolfsnail (Euglandina rosea) and rats, which consume both adults and juveniles. Habitat degradation from invasive plant species and human development has fragmented the remaining native forest areas essential for this species' survival. Climate change poses an additional threat by altering the moisture regimes and temperature conditions required for this moisture-dependent snail.

Threat summary

Habitat

Achatinella viridans inhabits native Hawaiian montane forests, particularly areas with high humidity and dense canopy cover that provide the moist microclimate essential for survival. The species is typically found on native trees and shrubs in elevations ranging from 300 to 800 meters in the Waianae Mountains of Oahu.

TERRESTRIAL· major

Other threatened species in ACHATINELLIDAE

VU

Lamellidea biplicata

Unknown
VU

Lamellidea ogasawarana

Unknown
EN

Newcombia lirata

Unknown
EN

Newcombia canaliculata

Unknown

Threatened in United States

VU

Lepiota echinella

Unknown
VU

Paddlefish

Polyodon spathula

Unknown
VU

Copper Shark

Carcharhinus brachyurus

Declining
EN

Lyophyllum deliberatum

Unknown

Frequently asked questions

Why is Achatinella viridans classified as Critically Endangered?
Achatinella viridans 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 viridans faces severe population decline primarily due to predation by introduced species, particularly the rosy wolfsnail (Euglandina rosea) and rats, which consume both adults and juveniles. Habitat degradation from invasive plant species and human development has fragmented the remaining native forest areas essential for this species' survival. Climate change poses an additional threat by altering the moisture regimes and temperature conditions required for this moisture-dependent snail.
Where does Achatinella viridans live?
Achatinella viridans occurs in United States. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Achatinella viridans?
The main threats to Achatinella viridans 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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