FRANKLIN, La. — Nutria — the large, semi-aquatic rodents native to South America — have become so invasive in Louisiana that the state wants them shot on sight, offering a $6 bounty for ...

If the mouse fell off, they were counted as being off-balance. But for healthy mice, this test is a cakewalk. As Prof. Uusisaari explains, "most mice species are arboreal animals, living in trees.

Nutria — the large, semi-aquatic rodents native to South America — have become so invasive in Louisiana that the state wants them shot on sight, offering a $6 bounty for their tails.

They show the 45-year-old man from Patterson using a hook to catch a nutria and then severing the rodent’s tail before letting it go. Agents found multiple similar videos, including images where ...