Thanks for all your responses. I would prefer to hunt things I can eat, but there are exceptions. The duck clubs around Sacramento kill all the beaver in their clubs, as they screw up the duck hunting habitat, and of course all the carp die in the spring as the duck ponds dry up. I assume from the article that efforts to kill nutria would be even more aggressive, as they seem to be more worried about the nutria than they are about the beaver and carp. The carp and beaver come back the next year, as I suppose they survive in other places. So if the opportunity arises, I will probably go bow hunting for nutria, even though I might not be able to recover any, since they are marked for extermination anyway.