EN

Matrona japonica

Unknown

Overview

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

Matrona japonica faces severe population declines primarily due to water pollution and habitat degradation of its pristine stream environments. Agricultural runoff, urban development, and dam construction have significantly altered the water quality and flow patterns essential for this damselfly's larval development. Climate change is exacerbating these pressures by altering precipitation patterns and increasing water temperatures beyond the species' tolerance range.

Threat summary

Habitat

Matrona japonica inhabits clean, fast-flowing mountain streams and rivers with rocky substrates in forested areas of Japan. The species requires pristine water quality and well-vegetated riparian zones for both larval development and adult reproduction.

Other threatened species in CALOPTERYGIDAE

VU

Neurobasis subpicta

Declining
EN

Clear-Winged Demoiselle

Calopteryx hyalina

Declining
VU

Caliphaea angka

Unknown
CR

Hetaerina dutati

Unknown

Frequently asked questions

Why is Matrona japonica classified as Endangered?
Matrona japonica is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Matrona japonica faces severe population declines primarily due to water pollution and habitat degradation of its pristine stream environments. Agricultural runoff, urban development, and dam construction have significantly altered the water quality and flow patterns essential for this damselfly's larval development. Climate change is exacerbating these pressures by altering precipitation patterns and increasing water temperatures beyond the species' tolerance range.
Where does Matrona japonica live?
Matrona japonica 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 Matrona japonica?
The main threats to Matrona japonica 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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