Achatinella stewartii
Overview
A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.
Achatinella stewartii faces severe population decline primarily due to predation by introduced species, particularly the rosy wolfsnail (Euglandina rosea) and various rat species that consume both adults and eggs. Habitat degradation from invasive plant species and feral ungulates has further reduced suitable native forest areas. The species' extremely limited range on O'ahu makes it particularly vulnerable to localized extinctions, with remaining populations fragmented across small forest patches.
Habitat
This endemic Hawaiian tree snail inhabits native mesic and wet forests on O'ahu, typically found on native trees and shrubs in montane forest areas. The species requires intact native forest canopy and understory vegetation for shelter and feeding on fungal films growing on plant surfaces.