Anthony P. Russell, Aaron M. Bauer's Amphibians and Reptiles of Alberta: A Field Guide and Primer PDF

By Anthony P. Russell, Aaron M. Bauer

ISBN-10: 1552380386

ISBN-13: 9781552380383

Amphibians & reptiles (herpetofauna) are an important yet a lot missed component to the traditional economic system of the province of Alberta. This moment version, which maintains either as a box consultant & a finished usual historical past, builds at the strengths of the 1st, with a richly illustrated textual content, & color photos of the species taken through popular flora and fauna photographer, Dr Wayne Lynch. The award-winning first version got popularity within the Emerald Awards for Environmental Excellence. This moment variation 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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Extra resources for Amphibians and Reptiles of Alberta: A Field Guide and Primer of Boreal Herpetology

Example text

If they survive to maturity, individuals of most turtle species may live to relatively old ages. In at least some species of tortoises (Family Testudinidae), longevity may exceed one hundred years. One of the largest families of turtles is the fresh-water Emydidae. This is primarily a northern group of turtles with many representatives in North America. Alberta's only confirmed chelonian, Chrysemys picta, is a representative of this group and is rather typical in its general features. This family and all of the northern turtle families are characterized by their ability to bend the neck in a vertically directed S-shaped curve.

5) Two prefrontal scales (Fig. 5 20A. Lateral stripes on 3rd and 4th rows of dorsal scales Thamnophis radix B. Lateral stripes on 2nd and 3rd rows of dorsal scales 21 21A. Eight upper labial scales (Fig. 6), both pairs of chin shields approximately equal in size Thamnophis elegans B. Seven upper labials (Fig. 6 43 44 AMPHIBIANS AND REPTILES OF ALBERTA Key to the Larval Amphibians of Alberta (Late Stages) Go to 1A. Body elongate, both front and hind limbs present, conspicuous external gills (Fig.

19A. B. Dorsal scales keeled (Fig. 5) Dorsal scales smooth Four prefrental scales (Fig. 5) Two prefrontal scales (Fig. 5 20A. Lateral stripes on 3rd and 4th rows of dorsal scales Thamnophis radix B. Lateral stripes on 2nd and 3rd rows of dorsal scales 21 21A. Eight upper labial scales (Fig. 6), both pairs of chin shields approximately equal in size Thamnophis elegans B. Seven upper labials (Fig. 6 43 44 AMPHIBIANS AND REPTILES OF ALBERTA Key to the Larval Amphibians of Alberta (Late Stages) Go to 1A.

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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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