Canterbury Knobbled Weevil
CR

Canterbury Knobbled Weevil

Hadramphus tuberculatus

Unknown

Photo: Photo: Wikimedia Commons, CC BY-SA

Overview

Hadramphus tuberculatus is a rare weevil endemic to Canterbury in the South Island of New Zealand. It was thought to be extinct in 1922 but was rediscovered in 2004.

Hadramphus tuberculatus faces severe population decline primarily due to habitat destruction from agricultural conversion and urban development across its native range. The species' specialized feeding requirements on specific host plants make it particularly vulnerable to landscape fragmentation, while invasive plant species further degrade remaining suitable habitat patches.

Threat summary

Habitat

This weevil species inhabits native grasslands and shrublands, particularly areas with its specialized host plants. It requires intact native vegetation communities with minimal disturbance from grazing or agricultural activities.

Grassland· major

Conservation measures underway

Site/area protectionInvasive/problematic species controlSpecies managementSpecies reintroduction

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Frequently asked questions

Why is Canterbury Knobbled Weevil classified as Critically Endangered?
Canterbury Knobbled Weevil 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. Hadramphus tuberculatus faces severe population decline primarily due to habitat destruction from agricultural conversion and urban development across its native range. The species' specialized feeding requirements on specific host plants make it particularly vulnerable to landscape fragmentation, while invasive plant species further degrade remaining suitable habitat patches.
Where does Canterbury Knobbled Weevil live?
Canterbury Knobbled Weevil occurs in New Zealand. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Canterbury Knobbled Weevil?
The main threats to Canterbury Knobbled Weevil are 12.1, 2.3, 4.1, and 5.3. The full IUCN-classified threat record for this species is detailed on the species page.

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