Biologists with drones and peanut butter pellets are on a mission yo help ferrets

In central Montana, drones are dropping peanut butter pellets on prairie dog colonies. It’s part of an effort by biologists to save North America’s most endangered mammal — the black-footed ferret (or as the U.S. Fish and Wildlife Service calls it, the BFF). (The vaccine was developed by scientists at UW–Madison.)