Nature & Geography | The Canadian Encyclopedia

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  • Article

    Violet

    The Violet is a family (Violaceae) of annual or perennial herbaceous plants widely distributed throughout temperate and tropical regions. Tropical species may reach tree size. Roughly 500 species of genera Viola (violets, pansies) and Hybanthus (green violets) alone occur worldwide.

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    Vireo

    The vireo (Vireonidae) is a family of small, basically olive green, insectivorous and partly frugivorous songbirds with repetitive, persistent song.

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    Volcano

     A volcano is an opening in the crust of a planetary body through which liquid, gaseous or solid material is expelled; also the structure formed by eruption of this material.

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    Vole

    Vole, common name for several rodents of family Muridae, found only in the northern hemisphere. 

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    Vulture

    The vulture is a large, long-winged, bald-headed bird of prey, normally abundant in warmer latitudes. 

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  • Article

    Walleye

    Walleye (Stizostedion vitreum vitreum), moderately large, predatory freshwater fish of the family Percidae (order Perciformes).

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    Walnut

    Walnut (Juglans), genus of trees of the walnut family (Juglandaceae). The roughly 15 known species are widely dispersed through temperate and tropical regions.

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    Walrus

    The walrus is a tusked, fin-footed mammal. In Canada, the Atlantic walrus is found primarily along the northern coasts of Hudson Bay, Davis Strait, Foxe Basin and Baffin Bay.

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    Wapiti

    The Wapiti (Cervus canadensis) is the second largest (after the moose), most highly evolved Old World deer. It is also known as the American elk.

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    Warbler

    Warbler is a name applied to several groups of birds, primarily the New World wood warblers, and Old World warblers of which only 3 species commonly breed in Canada.

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    Wasp

    Wasp is a term applied to stinging insects in the division Aculeata of the order Hymenoptera, which also includes ants and bees.

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    Water

    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.

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    Water Flea

    Water Flea, tiny crustacean that swims with jerky movements. 

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    Water Lily

    A large family of freshwater plants known as the water lily (Nymphaeaceae) is characterized by large, shield-shaped leaves and showy blossoms. They are mostly tropical or subtropical. Four genera and 9 species are native to Canada, of which 3 species are important.

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    Water Pollution

    Water pollution occurs when discharges of energy or materials degrade the quality of water for other users, including both humans and wildlife. Pollution can affect inland waters such as lakes, rivers and groundwater, as well as coastal marine waters.

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