Around the ‘60s-’70s, nutria were becoming very invasive in the warm waters of the power plant at Mountain Creek lake in West Dallas TX. The workers at the power plant would eat their brown bag lunches on the higher sloped hillside, while using their scoped 22 rifles to kill the nutria. Fun was had by all.
Evidently it must have made a difference because people around here do not see them near as much as they used to.