'The good Lord couldn't get rid of them': Louisiana's quest to hunt the swamp rat

A new documentary, Rodents of Unusual Size, follows the hunters waging war against an invasive species that 'put New York City sewer rats to shame'

There are no medals to be earned for the hunters who are fighting the swamp rat takeover of southern Louisiana. Instead, their reward after waging a successful battle against the 20lb, orange-toothed critters is $5 for each severed 12-18in tail they collect.

Louisiana's government collects the tails as proof of a kill and gives a cash payout to incentivize citizens to help the state's efforts to rein in the swamp rats, known as nutria, whose grazing has accelerated coastal erosion of land already vulnerable to hurricanes.