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By: Fast, Marie - Clark, Robert G. - Brook, Rodney W. - Fast, Peter L. F. - Devink, Jean-Michel - Leach, Steve W.Type: ArticleIn: The Canadian field-naturalistVolume: 122Series:Issue: 1Date: 2008-01-01Page Range: 21--28Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects: