LOCATION AND CONDITION OF KEY HABITAT:
- Federally listed: as Endangered
- State listed: as Endangered
- IUCN Red List Ranking: Critically endangered
- SEPP Ranking: Critically Imperiled
SPECIES INFORMATION: Newcombia cumingii is in the family Achatinellidae, subfamily Achatinellinae. This species is endemic to the island of Maui, where it is now only known to occur at two locations in the West Maui Mountains. Unlike other members of the subfamily, these tree-snails have highly textured, elongated shells making them very cryptic.
LOCATION AND CONDITION OF KEY HABITAT: One population exists in fragmented mesic habitat, while the other in intact mesic habitat, on West Maui.
THREATS: Wild populations are susceptible to predation by rats (Rattus rattus, Rattus exulans, and Rattus nowegicus), Euglandina rosea and chameleons (Chamaeleo jacksonii). Low reproductive rates, predation and limited dispersal abilities all increase the vulnerability of populations to demographic and environmental stochasticity such as inbreeding, loss of genetic diversity, hurricanes, high-winds, fires and drought.