From the heavyweight Wolverine to the middleweights-Ferrets and Fishers-and all the way down the weight classes to long-tail Weasels. the Mustelid family is perhaps the highest energy, most persistent and arguably the most ferocious carnivore hunters in North America............"They also have big brains relative to body mass, and they apply their neuronal bounty to continuously fine-tune their movements during a hunt, a strategy that allows them to attack prey up to 10 times their size"

Ferrets(above) :CLICK ON TITLE TO READ FULL ARTILE Basics Weasels Are  Built  for the Hunt By NATALIE ANGIER Members of the  mustelid family , including badgers,  ferrets and otters,  have evolved into remarkable predators. Or, copy and paste this URL into your browser: http://nyti.ms/1S2Zjx3 River Otters Wolverine Fisher(below) Pine Marten(below)