October 22, 2016 - The general waterfowl hunting season opens throughout much of the state.. The daily limit remains at 7, with no more than 2 mallard hens, 2 pintail, 2 canvasback and 3 scaup. The Central Valley can expect to see at least 7 million wintering ducks this season. For more information checkout the California DFW website at: dfg.ca.gov