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Arctic sovereignty is a key part of Canada’s history and future. The country has 162,000 km of Arctic coastline. Forty per cent of Canada’s landmass is in its three northern territories. Sovereignty over the area has become a national priority for Canadian governments in the 21st century. There has been growing international interest in the Arctic due to resource development, climate change, control of the Northwest Passage and access to transportation routes. As Prime Minister Stephen Harper said in 2008, “The geopolitical importance of the Arctic and Canada’s interests in it have never been greater.”

Yellowjacket is the common name for wasps in the genera Vespula and Dolichovespula. They belong to the insect family Vespidae in the order Hymenoptera, which also includes other types of wasps such as hornets, as well as bees and ants. Worldwide, there are about 50 recognized species of yellowjacket, 17 of which are native to Canada. These native species include the common (Vespula alascensis), Eastern (V. maculifrons), Western (V. pensylvanica) and aerial (Dolichovespula arenaria) yellowjacket. One species, the German yellowjacket (V. germanica), is introduced to Canada and is especially common in Ontario and Quebec.

Worldwide, over two-thirds of precipitation falling on land surfaces is evaporated and transpired back into the atmosphere. In Canada less than 40% is evaporated and transpired; the remainder, called the water yield, enters into streamflow.

Main Forest TypesWorldwide there are 3 main forest types related directly to climatic zones: equatorial- and tropical-region forests, temperate-zone forests, and forests associated with colder climates.

Hurricane Hazel struck the Toronto area on 15-16 October 1954, with devastating results. It was Canada's worst hurricane and Toronto's worst natural disaster. During the storm, winds reached 124 km/h and over 200 millimetres of rain fell in just 24 hours. This horrific storm left 81 dead, nearly 1900 families homeless, and caused between $25 and $100 million in damages (modern-day cost has been estimated at over $1 billion).

The North-West Territories was the first Canadian territory. It was Established on 15 July 1870. As a territory, the region became part of Canada. But it lacked the population, economic and infrastructure resources to attain provincial status. It thus fell under the jurisdiction of the federal government. It covered a vast area, stretching west from a disputed boundary with Labrador, across the northern portions of present-day Quebec and Ontario, through the Prairies to British Columbia, and north from the 49th parallel to the Arctic Ocean. The territory was subject to numerous boundary changes before 1905. At that time, the provinces of Saskatchewan and Alberta were carved out of the southwest portion of the region. In 1906, the remaining territory was renamed the Northwest Territories.

The common gartersnake (Thamnophis sirtalis) is a relatively small, striped, non-venomous snake. It is one of the most widespread snake species in North America and its range extends farther north than any other North American snake. In Canada, it is found in every province except Newfoundland and Labrador, and as far north as James Bay and into the southernmost Northwest Territories. The common gartersnake is broken into five subspecies across Canada: the Maritime gartersnake (Thamnophis s. pallidulus; PEI, NS, NB, QC), the Eastern gartersnake (Thamnophis s. sirtalis; QC, ON), the red-sided gartersnake (Thamnophis s. parietalis; ON, MB, SK, AB, BC, NWT), the valley gartersnake (Thamnophis s. fitchi; BC), and the Puget Sound gartersnake (Thamnophis s. pickeringii; BC).

Saskatchewan is home to at least 70 First Nations and various Métis communities. It contains 782 reserves, settlements and villages, many of which are located in the southern half of the province. Reserves in Saskatchewan were created between 1874 and 1906 by Treaties 2, 4, 5, 6, 8 and 10. As of 2016, 47.5 per cent of the province’s 114,570 self-identified First Nations peoples live on reserves, a percentage comparable to the province of Manitoba. Most of the remaining 47 per cent who reside off-reserve in Saskatchewan live in the cities of Saskatoon, Regina and Prince Albert.

Canada may be divided into seven physiographic regions. The Canadian Shield is the largest and oldest of these regions. The other six physiographic regions are younger and form two concentric rings around the Canadian Shield. The outer, older ring contains the Western Cordillera, Canadian Arctic and Appalachian Region. The second, younger ring contains the Interior Plains, Hudson Bay Lowlands and the St. Lawrence Lowlands. These regions may be further sub-divided based on their structure, relief and the presence or absence of permafrost and forest cover (see Natural Regions).

Areas quoted for these regions are the land areas and do not include adjacent continental shelves or bodies of ocean water within Canada's territorial limits. Readers should also note that the abbreviation “masl” stands for “metres above sea level.”

Winter occurs as the Earth's axis tilts away from the sun during the planet's annual rotation. The portion of the Earth that is furthest from the sun experiences winter, with weather that is colder than the other seasons. In the Northern Hemisphere, winter officially begins with the winter solstice, around 21 December, and ends at the spring equinox, around 21 March. Winter figures largely in Canada's climate, cultural experience and mythology. Every aspect of life in Canada is affected by winter, whether by heavy rains on the West Coast, isolation during the long Arctic winters, raging blizzards across the prairies or huge snowfalls in eastern Canada. Winter is reflected in Canadian art, literature, music, fashion, pastimes and attitudes.

A glacier is a large mass of ice, formed at least in part on land, that shows evidence of present or past movement. It is formed by the compaction and recrystallization of snow into ice crystals and commonly also contains air, water and rock debris. With approximately 200,000 km2 of glacier coverage in the Arctic and the West, Canada is home to a significant percentage of the world’s glaciers. By 2100, however, scientists predict that those in Alberta and British Columbia will have lost 70 per cent of their 2005 volume due to climate change.

The polar bear (Ursus maritimus) is the largest living species of bear. They are found throughout the circumpolar Arctic. In Canada, this means polar bears live in parts of the Yukon, the Northwest Territories, Nunavut, Manitoba,Ontario, Quebec and Newfoundland and Labrador. Polar bears are both culturally and economically significant to the Inuit. As climate change continues to reduce their sea ice habitat, polar bears are increasingly threatened.

Rupert’s Land was a vast territory of northern wilderness. It represented a third of what is now Canada. From 1670 to 1870, it was the exclusive commercial domain of the Hudson’s Bay Company(HBC) and the primary trapping grounds of the fur trade. The territory was named after Prince Rupert, the HBC’s first governor. Three years after Confederation, the Government of Canada acquired Rupert’s Land from the HBC for CAD$1.5-million (£300,000). It is the largest real estate transaction (by land area) in the country’s history. The purchase of Rupert’s Land transformed Canada geographically. It changed from a modest country in the northeast of the continent into an expansive one that reached across North America. Rupert’s Land was eventually divided among Quebec, Ontario, Manitoba, Saskatchewan, Alberta and the Northwest Territories.

The Rocky Mountain Trench is a long and deep valley extending approximately 1,500 km from the Bitterroot Valley in northwest Montana through British Columbia to the Liard Plain just south of the Yukon Territory. Its predominantly flat floor is 3–20 km wide and ranges in elevation between 600 m and 1,000 m above sea level. With walls made of sedimentary, volcanic and igneous rock, the Trench is sometimes referred to as the “Valley of a Thousand Peaks” because of the towering mountain ranges on either side: the Rocky Mountains to the east and the Columbia, Omineca and Cassiar mountains to the west. Humans have relied on the rich resources provided by this distinctive landscape from pre-colonial times to the present.

At 3,185 km (1,149 km of which lie in Canada), the Yukon River is the fifth-longest river in North America.

Canada’s national parks are protected areas established under federal legislation to preserve Canada’s natural heritage. They are administered by Parks Canada, a government agency that evolved from the world’s first national parks service, the Dominion Parks Branch, established in 1911. The National Parks System Plan, developed in 1970, divided Canada into 39 natural regions and set the goal of representing each region with at least one national park. Canada now has 48 national parks and national park reserves in 30 of these regions. In total, the parks cover more than 340,000 km2, which is over 3 per cent of Canada’s landmass. They protect important land and marine habitats, geographical features and sites of cultural significance. National parks also benefit local economies and the tourism industry in Canada.

(This is the full-length entry about National Parks of Canada. For a plain-language summary, please see National Parks of Canada (Plain-Language Summary).)

Agriculture is the practice of growing crops and rearing animals mainly for food. Farmers also produce other items such as wool from sheep and CBD oil from hemp plants.

In Canada, agriculture is an important industry. Only about 7 per cent of Canada’s land can be farmed. Other marginal (poorer) land can be used to ranch cattle. Aquaculture operations are found on the East and West Coasts and in the Great Lakes. Some crops such as tomatoes, cannabis and flowers are grown in greenhouses in urban centres. Canadian agriculture faces many challenges. Some of these challenges concern crop protection, soil conservation, labour, climate change and health.

Click here for definitions of key terms used in this article.

This is the full-length entry about agriculture in Canada. For a plain-language summary, please Agriculture in Canada (Plain-Language Summary).

The common raccoon (Procyon lotor) is a mid-size mammal distinguished by its black face mask and ringed tail. It is a member of the Procyonidae, a primarily tropical family of omnivores native to the Americas — and the only one of this family found in Canada. Raccoons are found in every province except Newfoundland and Labrador. A nocturnal species, it is highly adaptable and can survive in urban areas as well as wilderness habitats. Humans often consider raccoons pests due to their skill and persistence in raiding garbage bins, gardens and crops for food.