Sacramento River
A Guide to Recreation and Public Access
extirpation
Local extinction or complete disappearance of a species from a region.

More info:
http://www.dfg.ca.gov/hcpb/cgi-bin/read_one.asp?specy=fish&idNum=54
http://www.dfg.ca.gov/hcpb/cgi-bin/read_one.asp?specy=birds&idNum=81