Invasion

Invasion Description

1st Record: Sacramento/CA/Sacramento River (1883, Smith 1895; Dill and Cordone 1997)

1st Watershed Record: Sonoma County/CA ponds (1872, Smith 1895; Dill and Cordone 1997)

Geographic Extent

Sacramento/CA/Sacramento River (1883, Smith 1895; Dill and Cordone 1997); CA/Suisun Bay (Cohen and Carlton 1995; Matern et al. 2002)