page_title: Oʻahu tree snail
section_title: Conservation status
hierarchical_section_title: Oʻahu tree snail / Conservation status
caption_attribution_description: O'ahu tree snail shells collected ca. 1933 at an elevation of 1500 feet on Waialae Ridge in Honolulu, Hawaii, Waialae Country Club
context_page_description: Oʻahu tree snails, genus Achatinella, form a large genus of colorful, tropical, tree-living, air-breathing, land snails, arboreal pulmonate gastropod mollusks in the family Achatinellidae.
  This genus of tree snails is endemic to Hawaii, and all extant species are endangered. They were once abundant and were mentioned extensively in Hawaiian folklore and songs, and their shells were used in lei and other ornaments.
  Many of these arboreal snails are sinistral or left-handed in their spiral shell coiling, whereas most gastropod shells are dextral.
context_section_description: All 41 species are listed under United States federal legislation as endangered. The IUCN lists a number of these species as extinct and the remainder as critically endangered. The main cause of decline has been attributed to over collection. In addition, invasive species such as rats, Jackson's chameleons, and the highly predatory snail Euglandina rosea have been involved in the extinctions and declines of the native tree snails.
caption: O'ahu tree snail shells collected ca. 1933 at an elevation of 1500 feet on Waialae Ridge in Waialae Country Club, Honolulu, Hawaii.
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