Download e-book for iPad: Amphibians and Reptiles of Alberta: A Field Guide and Primer by Anthony P. Russell, Aaron M. Bauer

By Anthony P. Russell, Aaron M. Bauer

ISBN-10: 1552380386

ISBN-13: 9781552380383

Amphibians & reptiles (herpetofauna) are an important yet a lot ignored section of the usual economic system of the province of Alberta. This moment version, which keeps either as a box consultant & a finished typical historical past, builds at the strengths of the 1st, with a richly illustrated textual content, & color images of the species taken by means of well known flora and fauna photographer, Dr Wayne Lynch. The award-winning first variation obtained 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 additional, & maps & illustrations were up-to-date.

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

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1,000 m elevation Ambystoma tigrinum 8A. Egg mass cylindrical or elliptical, one envelope, SE corner of province only Spea bombifrons B. Egg mass irregular, one indistinct envelope, widespread Pseudacris maculata 9A. 5 mm Rana sylvatica B. Mass globular 10 10A. 5-6 mm Rana pipiens B. Egg diameter 10-15 mm Rana luteiventris Significant references for keys: Altig 1970; Altig et al. 1998; Anon 1964a, b; Corkran and Thorns 1966; Livezey and Wright 1947; Orton 1952; Petranka 1998; Powell et al. 1998; Savage 1959; Wright 1929.

Dorsal scale counts are important in identification. Most species have a conspicuous pale yellow or orange vertebral (mid-dorsal) stripe and a pale stripe low on each side. Garter snakes occupy a great variety of habitats from sea level to high in the mountains. Many are aquatic or semi-aquatic, but some are completely terrestrial. When caught, they often void feces and expel musk from their anal scent glands. They are viviparous. One species of Pituophis occurs in Alberta. This is the gopher snake or bullsnake (P.

Frogs and toads may also be located in the same way, often in daylight hours when they are at rest. Another sign of amphibian activity, especially in the spring and early summer, is the presence of eggs in bodies of water. To locate these, one must again walk the periphery of the pond and carefully examine the vegetation near the shore. Often, eggs can be found attached to such vegetation (see colour plates), or tadpoles can be seen swimming in and out of the vegetation near shore. In some instances, tadpoles can be located in relatively small isolated puddles where females lay the eggs to avoid the potential pressures of predation that may exist in the main body of the pond.

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Amphibians and Reptiles of Alberta: A Field Guide and Primer of Boreal Herpetology by Anthony P. Russell, Aaron M. Bauer

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