The main biomes of Western Canada are tundra, grasslands and forests. Biomes are ecological communities of plants and animals occupying a large portion of an area. There are actually four (4) biomes in Canada, the other one that is not previously mentioned is desert, and these are divided into different subcategories such as semi-arid desert, boreal forest, alpine tundra and temperate rainforest. Tundra refers to regions where the climate is very cold with long winters and extremely short summers. This means that precipitation is low in this particular area all year long – vegetation includes grasses and lichens and animals include polar bears and arctic fox. Grassland is a region wherein grasses are short and trees do not get enough moisture. Forest would include boreal forest which means that this region is mostly composed of evergreen trees like pine. Some of the animals which live in this region are deer, black bears and wolves.