Siberian roe deer changes its appearance dramatically depending on the season

The Siberian roe deer noticeably changes its appearance throughout the year. These changes are primarily due to the seasonal change in its coat, which helps the animal adapt to different climatic conditions.

In summer, the roe deer's coat is short, dense, and smooth, with tawny-red or brownish-ocher hues. This coat effectively wicks away heat, prevents overheating, and helps camouflage it among grass and foliage. Summer hair is thin and contains virtually no air space.

With the onset of autumn, molting begins, and the summer coat gradually gives way to winter fur. Winter fur becomes significantly longer, thicker, and lighter—usually grayish-brown or grayish-sand. Each hair is hollow and filled with air, creating effective thermal insulation and allowing the roe deer to survive the severe Siberian frosts.

Because of this, in winter the animal looks plumper and larger than in the warm season.