After decades of hurricanes and oil spills, the bayous of Louisiana face a new environmental threat–hordes of monstrous, 20-pound swamp rats. Known as nutria, these invasive South American rodents breed faster than the roving squads of hunters can control them, and with their orange teeth and voracious appetite they are eating up the coastal wetlands that protect Delacroix Island from hurricanes. But the defiant people who have lived here for generations are not the type of folks who will give up without a fight. They seek to preserve their communities, culture, and livelihoods from the onslaught of this most curious and unexpected invasive species. May the best mammal win.