This little animal is very much like the Weasel in size and form, but it usually prefers a colder climate, and makes its home in the northern regions of Sweden, Norway, Russia, Siberia and Arctic America. These animals do not often measure more than ten inches in length (not including the tail) but their skins are very valuable. They bring a high price, and a very important trade in them is carried on. In summer, the Ermine is of a beautiful brown color above and white below, while the tail is tipped with black. In winter the whole coat becomes a brilliant white, with sometimes a slightly yellow tinge, the tip of the tail remaining black. This is the season in which the fur is most valuable. THE MARTENS. [Illustration: MARTEN SEEKING FOOD IN THE TREES.] There are three species of Marten that make their home in Europe and Western Asia—the Pine Marten, the Sable and the Beech or Stone Marten. These all have large, open ears, and long bushy tails, and they live principally upon the trees, where, creeping from branch to branch, they hunt the small Birds and Squirrels. They are usually found in the gloom of dense forests. The Beech or Stone Marten is found in all parts of Europe, not only in the woods, but often in thick hedges and vineyards wherever there is shelter for it to creep along and hunt its prey. It will often make its home near a farm house and destroy with great fury the small domestic animals. The Sable is eagerly sought after on account of its fur. Its home is in the northern part of Europe, in the coldest parts of Russia and Siberia. The Turks, Russians and Chinese are the principal purchasers of their skins, and they distribute them in trade, far and wide, through Europe and Asia. The winter coat of the Sable is almost black and very close, and is much more valuable than when the animal is in summer dress. The Russian exiles in Siberia hunt the Sable, and when in search of this animal they are exposed to the perils of famine, climate and wild beasts. The Pine Marten is found in Northern Europe and North America. It owes its name to its supposed preference for the cones of the pine tree, as the Beech Marten is thought to select the fruit of the beech. The Pine Marten is of considerable size; its color yellowish, blended in some parts with a blackish tint; head lighter; throat yellow; tail long, bushy, and pointed. The fur varies in different individuals, both in color and fineness. This animal lurks in the thick woods, where its prey—Squirrels, Mice, Birds and their eggs—abound. It feeds likewise on Insects, Fish and the smaller Reptiles, and also on berries, nuts and honey. It is active and sprightly, and we are told by Dr. Godman that the Pine Marten frequently has his den in the hollows of trees, but very commonly takes possession of the nest of some industrious Squirrel, which it enlarges to suit its convenience, after putting the builder to death.