The taiga, the immense forest of the north, covers around 50 million square kilometers, which is more as all the tropical rain forests together. However, species diversity is a lot lower as those in the rain forest. Frozen for most of the year, covered in snow half a year and wet and boggy the other half. The most abundant trees are coniferous trees, whose needles are very hard to digest. This makes it hard for herbivores to live of these needles.
However, despite the low species diversity, there are some really nice species living in these forests. Species like Siberian Jays, Brown Bears and Wolverines. Often hard to find, but very rewarding when you find them. In these galleries you get an impression of these forests.