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Amphibians are members of a group of tetrapod (4-legged) vertebrate animals derived from fishes, and are the common ancestor to mammals and reptiles.

The nighthawk is a medium-sized bird of the goatsucker family (Caprimulgidae).

Ice-Worm is a common name for Mesenchytraeus solifugus, a dark-pigmented oligochaete worm (see Annelida) up to 4 cm long, found in tangled masses in the melting ice of glaciers in the Pacific Northwest.

The osprey (Pandion haliaetus) is a large, cosmopolitan bird of prey characterized by a crested head and contrasting black, white and grey plumage.

Humane societies are societies for the prevention of cruelty to animals (SPCA). Following a long struggle by Richard Martin, British landowner and parliamentarian, and others to secure legislation against cruelty to children and livestock, the first SPCA was begun in England in 1824.

Invertebrates are animals without a vertebral column (backbone). As a group, invertebrates are extremely diverse.

The gull (Laridae) family consists of long-winged, web-footed birds containing 2 subfamilies: Larinae and Sterninae.

Grayling is the common name for freshwater fishes of class Actinopterygii, family Salmonidae (salmon), subfamily Thymallinae (sometimes elevated to family rank).

Groundhog, see MARMOT.

The great auk (Pinguinus impennis), the largest and only flightless auk, is extinct.

Grebe is the common name for members of the family Podicipedidae, aquatic birds with almost worldwide distribution.

The black-footed ferret (Mustela nigripes) is a member of the mustelid family, commonly referred to as the weasel family.

A large bird of prey, the eagle (family Accipitridae) has exceptionally keen vision, long, powerful wings, a hooked bill and strong feet with sharp curved talons.

Arachnida is a large class of chelicerate arthropods (segmented, jointed-limbed animals) including the orders Araneae, Scorpiones, Opiliones, Pseudoscorpiones, Solifugae and the subclass Acari.

Mite is a common name for most members of the subclass Acari, a large, diverse group of tiny arachnids that also includes ticks.

The tuna is a swift, elegant marine fish of class Actinopterygii, order Perciformes, family Scombridae (mackerels).

The wolf is the largest wild member of the dog family. Living wolves belong to the Holarctic species Canis lupus (except red wolf, C. rufus of the southeast US).

Tick is a common name for a group of external bloodsucking parasitic arthropods of vertebrates (mainly of terrestrial mammals and birds).

Scale Insect, highly specialized insect belonging to order Hemiptera, suborder Homoptera, super-family Coccoidea.

Since 1967 WWF-Canada has been working with business, government and the public to stop the degradation of the planet's natural environment, and to build a future in which humans live in harmony with nature.