Ermine. In winter, the ermine becomes completely white, practically merging with the surrounding sn

Ermine. In winter, the ermine becomes completely white, practically merging with the surrounding snow in its coloring, and only the tip of the tail invariably remains black.  Such color mimicry helps these animals both hunt more successfully and hide themselves from other larger predators. Also, ermine fur in winter becomes especially thick and soft, warming its owner more.