Summer or winter, the Northern trapper is constantly surrounded by ermine and signs of ermine. There are the tiny claw-tracks almost like frost tracery across the snow. There is the rifled nest of a poor grouse--eggs sucked, or chickens murdered, the nest fouled so that it emits the stench of a skunk, or the mother hen lying dead from a wound in her throat. There is the frightened rabbit loping across the fields in the wildest, wobbliest, most woe-begone leaps, trying to shake something off that is clinging to his throat till over he tumbles--the prey of a hunter that is barely the size of rabbit's paw. There is the water-rat flitting across the rocks in blind terror, regardless of the watching trapper, caring only to reach safety--water--water! Behind comes the pursuer--this is no still hunt but a straight open chase--a little creature about the length of a man's hand, with a tail almost as long, a body scarcely the thickness of two fingers, a mouth the size of a bird's beak, and claws as small as a sparrow's. It gallops in lithe bounds with its long neck straight up and its beady eyes fastened on the flying water-rat. Splash--dive--into the water goes the rat! Splash--dive--into the water goes the ermine! There is a great stirring up of the muddy bottom. The water-rat has tried to hide in the under-tangle; and the ermine has not only dived in pursuit but headed the water-rat back from the safe retreat of his house. Up comes a black nose to the surface of the water. The rat is foolishly going to try a land race. Up comes a long neck like a snake's, the head erect, the beady eyes on the fleeing water-rat--then with a splash they race overland. The water-rat makes for a hole among the rocks. Ermine sees and with a spurt of speed is almost abreast when the rat at bay turns with a snap at his pursuer. But quick as flash, the ermine has pirouetted into the air. The long writhing neck strikes like a serpent's fangs and the sharp fore teeth have pierced the brain of the rat. The victim dies without a cry, without a struggle, without a pain. That long neck was not given the ermine for nothing. Neither were those muscles massed on either side of his jaws like bulging cheeks.