By Anthony P. Russell, Aaron M. Bauer

Amphibians & reptiles (herpetofauna) are an important yet a lot overlooked section of the common economic system of the province of Alberta. This moment variation, which keeps either as a box consultant & a complete usual historical past, builds at the strengths of the 1st, with a richly illustrated textual content, & color images of the species taken by means of popular flora and fauna photographer, Dr Wayne Lynch. The award-winning first version got reputation within the Emerald Awards for Environmental Excellence. This moment version has been completely revised & up to date. Nomenclature has been replaced to mirror present considering within the box. New pictures were further, & maps & illustrations were up-to-date.

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Additional resources for Amphibians and Reptiles of Alberta: A Field Guide and Primer of Boreal Herpetology

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R. R. R. R. 1984; Bider and Matte 1990; Chabot and St. R. R. R. 1984; Weller and Green 1997 Stebbins 1985; Reichel and Flath, 1995 Montana is also included for comparison as it lies adjacent to Alberta. There is the possibility of four other species occurring in Alberta (see Chapter 5). R. 1984; Alberta Fish and Wildlife 1985). 32 AMPHIBIANS AND REPTILES OF ALBERTA venom injection mechanism among snakes. Large, hollow, moveable fangs are located at the front of the upper jaw. In biting, they are swung forward from their folded resting position, and the victim is stabbed and poisoned in a rapid thrust.

Many of the paired internal organs are either reduced to a single representative or staggered so that one of the pair lies in advance of the other within the long, slender body cavity. All snakes are either insectivorous or carnivorous and the head skeleton is modified in such a way that the jaws can be "dislocated" and spread apart to enable large prey items to be consumed. Boids and pythons feed mainly on mammals and kill them by constriction. Members of the families Elapidae and Viperidae subdue prey with venom, injected by way of fangs and produced in modified salivary glands.

Climbing is achieved by modifications of rectilinear or lateral undulatory methods, or by a concertina type of locomotion in which the body coils around the support, such as a tree trunk, holds on with the tail and hind end of the body, reaches up with the head and front end of the body and hooks around the trunk higher up. The hind end of the body then releases and is drawn up by the body muscles. Many snakes lay eggs and deposit them in an appropriate nest site, after which they leave them. Some species, however, such as certain pythons, remain with the eggs and incubate them in coils of the body, using their muscles to generate metabolic heat to assist in incubation.

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