Invasion

Invasion Description

1st Record: Whatcom County/WA/Birch Bay (1963, Duggan 1963, cited by Carlton 1979)

Geographic Extent

Whatcom County/WA/Birch Bay (1963, Duggan 1963, cited by Carlton 1979); Grauer Beach/British Columbia/Boundary Bay (date unknown, Carlton 1992; 7/10/2007, Klinkenberg 2013)