CR

Kadua grantii

Declining

Overview

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

Kadua grantii faces severe threats from invasive plant species that outcompete this endemic Hawaiian shrub for resources and habitat space. Habitat degradation from feral ungulates, particularly pigs and goats, has destroyed much of its native dry forest ecosystem. Urban development and agricultural expansion have further reduced its already limited range on the Hawaiian islands.

Threat summary

Habitat

Kadua grantii inhabits dry to mesic forests and shrublands in the Hawaiian Islands, typically growing in rocky or volcanic soils at elevations between 300-1,200 meters. This endemic species is adapted to the unique microclimatic conditions of Hawaiian dry forest ecosystems.

Other threatened species in RUBIACEAE

EN

Arachnothryx tacanensis

Declining
CR

Arachnothryx tenorioi

Unknown
VU

Aidia abeidii

Unknown
EN

Arachnothryx tuxtlensis

Declining

Frequently asked questions

Why is Kadua grantii classified as Critically Endangered?
Kadua grantii 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. Kadua grantii faces severe threats from invasive plant species that outcompete this endemic Hawaiian shrub for resources and habitat space. Habitat degradation from feral ungulates, particularly pigs and goats, has destroyed much of its native dry forest ecosystem. Urban development and agricultural expansion have further reduced its already limited range on the Hawaiian islands.
Where does Kadua grantii live?
Kadua grantii occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Kadua grantii?
The main threats to Kadua grantii 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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