Recovery Strategies

Recovery Strategy and Action Plan for the Rainbow (Villosa iris) in Canada

The Rainbow is a small freshwater mussel with an average length of 55 mm. It has a narrow elliptical shape and interrupted green rays. The beaks are low and compressed and sculpture consists of 4–6 distinct bars. The outside of the shell is yellowish, yellowish-green or brown (in old specimens), with numerous wide, broken dark green rays that cover the whole surface of the shell or are absent anteriorly. This species is considered N2N3 (nationally vulnerable – imperilled) in Canada where it has been assessed as Endangered by the Committee on the Status of Endangered Wildlife in Canada and listed as Endangered under the Species at Risk Act. The Canadian distribution is restricted to Ontario. The current distribution of the species includes populations found in the St. Clair River delta and the Saugeen, Maitland, Bayfield, Ausable, Sydenham, Thames (North and Middle), Grand (including Conestogo and Mallet rivers), lower Trent, Salmon and Moira rivers.

This document is being re-posted as Proposed for public comment as changes were made based on new data and information that were incorporated after the initial public consultation period (2016-08-25 to 2016-10-24).

Consultation period: 2018-07-03 to 2018-09-01


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Contact Person(s)

SARA Directorate
Department of Fisheries and Oceans
200 Kent St.
Ottawa, ON
K1A 0E6
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Related Species


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