CR

Cyanea glabra

Declining

Overview

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

Cyanea glabra faces severe population decline primarily due to habitat destruction from invasive plant species that outcompete native vegetation in its montane forest ecosystem. Feral ungulates, particularly pigs and goats, trample and destroy individual plants while degrading the understory habitat essential for regeneration. The species' extremely limited range on Maui makes it vulnerable to stochastic events, while its small population size creates genetic bottlenecks that further threaten long-term viability.

Threat summary

Habitat

Cyanea glabra is endemic to the montane wet forests of Maui, Hawaii, typically found in native ohia-dominated ecosystems at elevations between 1,200-1,800 meters. The species requires the humid, shaded understory conditions characteristic of intact Hawaiian montane rainforests.

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Frequently asked questions

Why is Cyanea glabra classified as Critically Endangered?
Cyanea glabra 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. Cyanea glabra faces severe population decline primarily due to habitat destruction from invasive plant species that outcompete native vegetation in its montane forest ecosystem. Feral ungulates, particularly pigs and goats, trample and destroy individual plants while degrading the understory habitat essential for regeneration. The species' extremely limited range on Maui makes it vulnerable to stochastic events, while its small population size creates genetic bottlenecks that further threaten long-term viability.
Where does Cyanea glabra live?
Cyanea glabra 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 Cyanea glabra?
The main threats to Cyanea glabra 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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