The main tree species, the length of the growing season and summer temperatures vary across the world.

The Adirondack Mountains of Upstate New York form the southernmost part of the Eastern forest-boreal transition ecoregion, constituting part of the world’s taiga biome. In Eurasia, it covers most of Sweden, Finland, much of Russia from Karelia in the west to the Pacific Ocean (including much of Siberia), much of Norway and Estonia, some of the Scottish Highlands, some lowland/coastal areas of Iceland, and areas of northern Kazakhstan, northern Mongolia, and northern Japan (on the island of Hokkaidō). In North America, it covers most of inland Canada, Alaska, and parts of the northern contiguous United States. The taiga or boreal forest has been called the world's largest land biome. Taiga ( / ˈ t aɪ ɡ ə/ Russian: тайга́, IPA: relates to Mongolic and Turkic languages), generally referred to in North America as a boreal forest or snow forest, is a biome characterized by coniferous forests consisting mostly of pines, spruces, and larches. Russia, Mongolia, Japan, Norway, Sweden, Iceland, Finland, United States, Canada, United Kingdom, Saint-Pierre-et-Miquelon (France) The taiga is found throughout the high northern latitudes, between the tundra and the temperate forest, from about 50°N to 70°N, but with considerable regional variation.

Blue planet biomes taiga