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In 1971, Hydro-Québec and the government of Quebec initiated the James Bay Project, a monumental hydroelectric-power development on the east coast of James Bay. ( See also Hydroelectricity in Canada.) Over the course of two phases, a total of eight generating stations were built, allowing for the pollution-free production of a significant portion of Quebec’s electricity. However, the project also profoundly disrupted the environment and the Indigenous communities living in the region, the effects of which are still being felt today.

Dinosaurs were a group of animals that dominated the land environments of every continent. They lived from the late Triassic period to the end of the Cretaceous period (225 to 65 million years ago). However, birds are the direct descendants of dinosaurs, meaning dinosaurs are still common today. Paleontologists have found at least 88 different species of dinosaurs in Canada (see also Dinosaurs Found in Canada). The primary site of these fossils is Dinosaur Provincial Park, Alberta. Well-known dinosaurs first named from Canadian specimens include Albertosaurus, Centrosaurus, Corythosaurus, Dromaeosaurus,Gorgosaurus, Lambeosaurus, Pachyrhinosaurus, Parasaurolophu sand Styracosaurus.

A timber slide is a water-filled chute or runway built to carry “cribs” of timber around rapids and waterfalls. (See also Raft). Similar devices for individual pieces of wood were called “flumes.” Timber slides contributed to the growth of the timber industry in the 19th century (see Timber Trade Industry).

Frogs are amphibians belonging to the order Anura. Worldwide, frogs are the most numerous group of amphibians, with more than 5,000 living species. They are found on all continents except Antarctica. There are 24 species of frog currently found in Canada. In addition, one species, the Blanchard’s cricket frog, is extirpated. This means that, while it continues to live in other parts of its range, it is no longer found in Canada. Five of Canada’s frog species are toads, which are frogs belonging to the family Bufonidae.

While most frog species in Canada are found in the southern reaches of the country, a few, for example the boreal chorus frog, have ranges extending into Yukon and the Northwest Territories, and in the case of the wood frog, Nunavut.

Toad is a common name for frogs belonging to the family Bufonidae. The distinction is not firm, but the word toad is generally applied to frogs with relatively short legs and thick bodies, dry, often “warty” skin and reduced webbing between the toes. Five toad species are found in Canada, living in drier habitats than most other frogs. In Canada, other frogs commonly called toads are the Plains and Great Basin spadefoots (family Scaphiopodidae).

For more general information about frogs (including toads) see Frog Species in Canada.

Humans have been exploring the North American Arctic for centuries, beginning about 5,000 years ago when Palaeo-Inuit were looking for a homeland, followed by the early Inuit (Thule) — ancestors of the Inuit. European exploration of the same region began with the Norse in the 10th century and, after a short pause, was continued by Englishmen during the Elizabethan era (1558–1603). Over the next several hundred years, explorers ventured to the Arctic in search of resources, scientific knowledge, national prestige, personal fame and a navigable Northwest Passage. The most successful of these explorers adapted to the harsh Arctic environment and adopted the tools and practices of northern Indigenous peoples.

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.”

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).

Flatfish is the common name for fish belonging to the order Pleuronectiformes. There are 14 families of flatfish and over 800 species worldwide. In Canadian waters there are approximately 39 species of flatfish, from five families. These families are Pleuronectidae, Bothidae, Paralichthyidae, Scophthalmidae and Cynoglossidae. Familiar flatfishes found in Canada include halibut, plaice, flounder and turbot. Among their distinguishing features, flatfish have both eyes on one side of their body.

Salamanders are tailed amphibians belonging to the order Caudata. There are around 800 known species worldwide; 22 are found in Canada. In addition to these species, the unisexual Ambystoma, a unique lineage of salamanders that does not conform to the typical definition of a species, are also found in Canada. Salamanders mainly live in the temperate regions of the Northern Hemisphere and tropical South and Central America. North America is home to more species of salamanders than anywhere else in the world. In Canada, salamanders are found from the Maritimes to British Columbia, and as far north as central Labrador and northern British Columbia; none have been recorded on the island of Newfoundland.

Lambeosaurus is a genus of large, plant-eating, duckbilled dinosaur. There are three known species of Lambeosaurus, all found in southern Alberta: L. clavinitialis, L. lambei and L. magnicristatus. In 1913, fossil collector Charles H. Sternberg discovered the first Lambeosaurus fossils in the modern-day Dinosaur Provincial Park area. A year later, Canadian paleontologist Lawrence Lambe named the fossils Stephanosaurus marginatus. Fellow Canadian William Parks then renamed the species Lambeosaurus lambei in 1923 in honour of Lambe. (See also Dinosaurs Found in Canada.)

Canada has seven primary vegetation regions, in addition to the marine flora found along the country’s coasts. Vegetation regions are geographical areas characterized by distinct plant communities. Community composition, determined primarily by climate (e.g., temperature, precipitation and sunlight), may be affected by factors such as geology, soil composition and erosion, water drainage patterns and human interference. Each vegetation region supports a characteristic animal community that may also affect its composition.

This is a full-length entry about Vegetation Regions. For a plain-language summary, please see Vegetation Regions (Plain-Language Summary).

The Fowler’s toad (Anaxyrus fowleri) is a medium-sized, earthen-coloured toad that is native to Eastern North America. In Canada, Fowler’s toads are only found in a few small areas along the north shore of Lake Erie. This species lives in places with sandy or gravelly soils into which individuals can burrow; Fowler’s toads spend much of their time underground. Due to small and declining populations, the Fowler’s toad is endangered in Canada.

For some Indigenous peoples, Turtle Island refers to the continent of North America. The name comes from various Indigenous oral histories that tell stories of a turtle that holds the world on its back. For some Indigenous peoples, the turtle is therefore considered an icon of life, and the story of Turtle Island consequently speaks to various spiritual and cultural beliefs.

This is the full-length entry about Turtle Island. For a plain-language summary, please see Turtle Island (Plain-Language Summary).

At 3,185 km (1,149 km of which lie in Canada), the Yukon River is among the longest rivers in the country (see also Longest Rivers in Canada). Its headwaters are in the northwest corner of British Columbia, at the province’s border with the Yukon. It flows north and northwest across the Yukon into Alaska, then west to Norton Sound on the Bering Sea. Within the large central plateau of the Yukon, ringed by the Mackenzie Mountains to the east and the St. Elias range to the southwest, the Yukon River and its tributaries form the region’s dominant drainage basin.

Based on geological history, Canada can be divided into six regions, each characterized by a distinctive landscape: the Canadian Shield, Interior Platform, Appalachian Orogen, Innuitian Orogen, Cordillera and Western Canada Sedimentary Basin, and the Eastern Continental Margin.