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Molluscs

Taildropper, Blue-grey  | Prophysaon coeruleum

Status: Threatened

Last Examination and Change: April 2016 (In a lower risk category)

Canadian Occurrence: BC

Status Criteria: B1ab(iii)+2ab(iii)

Reason for Designation: This small, slender blue-coloured slug is only found in western North America where it lives in the moist layer of fallen leaves and mosses in mixed-wood forest. In Canada, it is confined to the southeastern tip of Vancouver Island within the Coastal Douglas-fir biogeoclimatic zone and where it transitions into the Coastal Western Hemlock biogeoclimatic zone. These habitats are declining in extent and what remains is becoming increasingly fragmented. Fifteen subpopulations are currently known, an increase that has resulted in a change of status. A continuing decline in habitat quality is expected due to natural ecosystem modification and competition with invasive species as well as droughts and severe weather events from climate change.

Status History: Designated Endangered in April 2006. Status re-examined and designated Threatened April 2016.

Find out more about this species on the Species at Risk Act Public Registry

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