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The term "energy" is often used interchangeably with the term "power," but incorrectly so. Energy is defined as the capacity to do work and is measured in joules (J) or watt hours (1 Wh = 3600 J).

Sawfly, common name for members of insect order Hymenoptera, which resemble wasps and are characterized by the lack of a marked constriction between the first and second abdominal segments.

The cuckoo (Cuculidae) is a family of birds with about 130 species, including common cuckoos, anis, couas, coucals and roadrunners, distributed almost worldwide.

Crayfish, moderately sized freshwater Crustacean of order Decapoda, similar in appearance to the American lobster.

The dipper (Cinclidae) family of birds comprises 5 species of birds known colloquially as water ouzel.

The dobsonfly is a large (100-140 mm), soft-bodied freshwater insect of order Megaloptera, family Corydalidae; smaller forms are called fishflies.

Crab, common name for 2 groups of decapod ("ten-footed") Crustaceans. The Anomura, including hermit, mole and lithoid crabs, have relatively normal abdomens.

The crane (Gruidae) is a family of large, long-necked birds with sturdy bills and long, powerful legs.

Over 2000 species of true crickets (superfamily Grylloidea) are known worldwide.

Currant, see BERRIES, WILD.

Black-capped Chickadees (Poecile atricapillus) live in woodlands across North America, and are regular visitors to backyard birdfeeders throughout Canada.

Crocus, Prairie, see ANEMONE.

Fruit growing is an important part of Canada’s food industry. Growing is usually restricted to areas where winter temperatures do not go much below -20°C.

Eastern Temperate Forests, see vegetation regions.

A periglacial landform is a feature resulting from the action of intense frost, often combined with the presence of permafrost. Periglacial landforms are restricted to areas that experience cold but essentially nonglacial climates.

Deer Mouse (Peromyscus maniculatus), typical mouse with moderately long tail, large ears, prominent eyes and pointed nose well supplied with tactile hairs.

Catfish, small to large, primarily freshwater fishes of order Siluriformes (about 2000 species worldwide).

Cypress is the common name for evergreen conifers of genus Cupressus of the cypress family (Cupressaceae). At least 12 species are recognized worldwide occurring in warm, northern temperate regions.

In butterworts (Pinguicula) sticky leaf surfaces act as flypaper to trap prey; in sundews (Drosera) sticky, long-stalked glands serve the same function, then bend inwards to enfold the victim.

Carrot (Daucus carota), cool-climate plant belonging to the Umbelliferae family and grown as a root crop in Canada. Carrots are biennials, but are grown as annuals.