Invasive swamp rodent has California scrambling to come up with a battle plan
About the size of a beagle, they can quickly turn a lush green marsh to a wasteland. … They are called nutria, and right now they’re starting to spread through the waterways leading into the Sacramento-San Joaquin Delta, the ecologically fragile network of sloughs and rivers that functions as the heart of California’s flood-control and water distribution system.