Under the Maples by John Burroughs

In wild life the race is not always to the swift, nor the battle to the strong. For instance, the weasel catches the rabbit and the red squirrel, both of which are much more fleet of foot than is he. The red squirrel can fairly fly through the tops of the trees, where the weasel would be entirely out of its element, and the rabbit can easily leave him behind, and yet the weasel captures and sucks the blood of both. Recently, when the ground was covered with our first snow, some men at work in a field near me heard a rabbit cry on the slope below them. Their dog rushed down and found a weasel holding a rabbit, which it released on the approach of the dog and took to the cover of a near-by stone wall. The whole story was written there on the snow. The bloodsucker had pursued the rabbit, pulling out tufts of fur for many yards and then had pulled it down.

Two neighbors of mine were hunting in the woods when they came upon a weasel chasing a red squirrel around the trunk of a big oak; round and round they went in a fury of flight and pursuit. The men stood and looked on. It soon became apparent that the weasel was going to get the squirrel, so they watched their chance and shot the bloodsucker. Why the squirrel did not take to the tree-tops, where the weasel probably would not have followed him, and thus make his escape -- who knows? One of my neighbors, however, says he has seen where a weasel went up a tree and took a gray squirrel out of its nest and dropped it on the snow, then dragged it to cover and left it dead. The weasel seems to inspire such terror in its victim that it becomes fairly paralyzed and falls an easy prey. Those cruel, blazing, beadlike eyes, that gliding snakelike form, that fearless, fatelike pursuit and tenacity of purpose, all put a spell upon the pursued that soon renders it helpless. A weasel once pursued a hen to my very feet and seized it and would not let it go until I put my foot upon it and gripped it by the back of the neck with my hand. Its methods are a kind of _Schrecklichkeit_ in the animal world. It is the incarnation of the devil among our lesser animals.