You have another option, too. Since waterfowl are protected by the U.S. Fish and Wildlife Service, you cannot catch and move them yourself. Instead, you might want to contact a permitted local wildlife rehabilitation center if there is a need to move them after hatching to a more appropriate non-residential setting. For a list of permitted wildlife rehab facilities, please go to www.dfg.ca.gov/wildlife/WIL/rehab/facilities.html.
For example, it is a crime to refuse to show a wildlife officer “... all licenses, tags, and the birds, mammals, fish, reptiles or amphibians taken or otherwise dealt with under this code, and any device or apparatus designed to be, and capable of being, used to take birds, mammals, fish, reptiles, or amphibians” (Fish and Game Code, section 2012).
Also, wildlife officers are authorized to inspect all receptacles, except the clothing actually worn by a person at the time of inspection, where birds, mammals, fish, reptiles or amphibians may be stored or placed (FGC, section 1006).