The Boreal Forest biome is the largest terrestrial biome and extends across Europe, North America, and Asia. It is located right below the tundra biome. The Boreal Forest biome is also known as coniferous forest. This biome typically has short, wet summers and long, cold winters. Precipitation is moderate in the Boreal Forest. It gets plenty of snow during the winter and plenty of rainfall during the summer. There is not much variety in plants. Majority of the plants are conifer trees which is why the Boreal Forest is referred to as the coniferous forest. The conifer trees in the taiga biome are referred to as evergreen. This means they remain green all year round and never drop their leaves. Because evergreen trees do not drop leaves, there is nothing to keep the soil in the taiga full of nutrients. This is the reason why there is not much variety in the vegetation. For six months out of the year, the temperature in the Boreal Forest biome is below freezing. Plants can only grow during the summer when temperatures are favorable. This growing season only lasts about three months. Many animals of the Boreal Forest biome have to migrate to warmer areas or hibernate during the long, cold winters.