Invasion

Invasion Description

1st Tidal Record: CA/Sacramento-San Joaquin Delta (1959, Riegel 1959; Cohen and Carlton 1995)

1st Watershed Record: Chico/Buttte County/Sacramento County (1941, Cohen and Carlton 1995)

Geographic Extent

Chico/Buttte County/Sacramento County (1941, Riegel 1959; Cohen and Carlton 1995); CA/Sacramento-San Joaquin Delta (1959, Riegel 1959; Cohen and Carlton 1995); Sacramento County/CA/Cosumnes River (Riegel 1959; Cohen and Carlton 1995); Sacramento County/CA/Putah Creek (Riegel 1959; Cohen and Carlton 1995)