CR

Planorbella columbiensis

Unknown

Overview

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

Planorbella columbiensis faces severe threats from habitat degradation and water quality deterioration in its limited freshwater environments. Urban development and agricultural runoff have significantly impacted the pristine aquatic conditions this endemic snail requires. The species' extremely restricted range makes it particularly vulnerable to localized environmental changes, with pollution and sedimentation posing immediate risks to remaining populations.

Threat summary

Habitat

This freshwater snail inhabits slow-moving streams, ponds, and wetland areas with clean, well-oxygenated water and abundant aquatic vegetation. It requires stable aquatic environments with minimal disturbance and specific water chemistry conditions typical of its native Pacific Northwest range.

Wetlands (inland) - Permanent freshwater lakes· major

Conservation measures underway

Species recovery

Other threatened species in PLANORBIDAE

EN

Africanogyrus starmuehlneri

Unknown
VU

Lamb Ramshorn

Planorbella oregonensis

Unknown
Ancylastrum cumingianusCR

Ancylastrum cumingianus

Unknown
EN

Afrogyrorbis crassus

Declining

Frequently asked questions

Why is Planorbella columbiensis classified as Critically Endangered?
Planorbella columbiensis 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. Planorbella columbiensis faces severe threats from habitat degradation and water quality deterioration in its limited freshwater environments. Urban development and agricultural runoff have significantly impacted the pristine aquatic conditions this endemic snail requires. The species' extremely restricted range makes it particularly vulnerable to localized environmental changes, with pollution and sedimentation posing immediate risks to remaining populations.
Where does Planorbella columbiensis live?
Planorbella columbiensis 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 Planorbella columbiensis?
The main threats to Planorbella columbiensis 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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