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The poplar is a short-lived, deciduous, hardwood tree of genus Populus of the willow family, widely distributed in the northern temperate zone.

A rainbow is a coloured arc that occurs when sunlight shines onto falling raindrops and is refracted, then reflected back towards the observer. In this process, each drop acts as a tiny prism, splitting the sun's rays (according to wavelength) into their component colours.

Ragweed is an annual or perennial plant of the genus Ambrosia, family Compositae or Asteraceae. Fifteen species are native to North America; 3 occur across Canada: common ragweed (A. artemisiifolia), perennial ragweed (A. coronopifolia) and giant ragweed (A. trifida).

Early land plants have long been known from Eastern Canada, thanks to pioneering work by Sir J. William Dawson, father of Devonian palaeobotany and principal of McGill University from 1855 to 1893. But this record poorly represented the earliest phase of land colonization.

Foresters use forest surveys to obtain information on the condition of the FOREST and monitor any changes, since there are not only surveys of standing trees, but also surveys after logging as well as forestry surveys aimed at prescribing treatments.

Description Rays are flattened dorsoventrally, the body appearing disclike. The pectoral fins are attached to the side of the head. The mouth, nostrils and 5 pairs of gill slits are located on the white lower surface. A pair of spiracles occurs on the upper surface behind the eyes.

Radish (Raphanus sativus) is a hardy annual or biennial vegetable belonging to the Cruciferae family. Roots are mostly rounded with a red exterior and white, acrid flesh.

Rat control in Alberta is administered and co-ordinated by Alberta Agriculture and Food. It was established in 1950 to keep Alberta free of Norway rats (seeRAT), which were introduced to the east coast of North America in 1775

The raven is a large, black bird with a purplish lustre, belonging, like the crow, to the genus Corvus.

The Grouse (Tetraonidae) is a small subfamily (18 species) of chickenlike birds with circumpolar distribution above latitude 26° north.

Borden Island, 2794 km2, is one of the Queen Elizabeth group of islands in the High Arctic. Most of the island is part of the Northwest Territories; the easternmost part of the island is part of Nunavut.

Wheat is the common name for members of genus Triticum of the grass family (Gramineae) and for the cereal grains produced by these grasses.

The storm-petrel (order Procellariiformes, family Hydrobatidae) is a small seabird (14-25 cm long).

Finch is a common name for one of the larger bird families, Fringillidae, which occurs worldwide (introduced in Australia). It includes some GROSBEAKS, crossbills, Hawaiian honey creepers, redpolls, siskins and birds specifically named finches.

The pigeon (Columbidae) is a large family (303 species) of birds, many of which are called doves, distributed throughout temperate and tropical areas worldwide.

Bluebell, common name for several plants with bell-shaped flowers of Campanulaceae and Boraginaceae families.

Shell is a hard covering made primarily of calcium carbonate, secreted by invertebrate animals (eg, molluscs, barnacles, sea urchins).

The wild horses, named for the island they inhabit, are now the only terrestrial mammals on Sable Island aside from the few inhabitants.