Rana sylvatica LeConte, 1825

Wood frog

Species recognized by The Integrated Taxonomic Information System external link, T Orrell (custodian) in 
IUCN Red List Status: NOT EVALUATED external link Showing: scientific names

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Rana sylvatica LeConte, 1825

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Rana sylvatica
Rana sylvatica
Rana sylvatica Le Conte, 1825
Rana sylvatica Le Conte, 1825
Rana sylvatica Le Conte, 1825
Rana sylvatica
Rana sylvatica

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General Description

Description

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AmphibiaWeb external link
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See http://www.amphibiaweb.org/datause.html.. Some rights reserved external link
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Franziska Sandmeier
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Adults are 37 to 83 mm in length, and females are larger. Prominent dorsolateral folds extend from the bead to near the vent. The lateral edge of each fold is darker than the medial edge. The smooth to moderately rough back often has short folds between the dorsolateral folds. Toes are webbed, with tow or three phalanges of the fourth toe free of the web. Dorsal coloring may be gray to tan to vivid reddish brown , and is coppery or golden in some individuals. Females are usually more reddish. Black or dark brown markings may be present on the back and sides, and many northern and western specimens have a middorsal white line. A conspicuous dark brown or blackish mask extends from the snout to just behind the tympanum. The white venter is sometimes darkly mottled on the throat and breast, and is smooth except for a granular region under the thighs. There also is a prominint dark marking in the pectoral region. The tympanum is smaller than the eye. Males have paired vocal sacs, stout forelegs, and a "thumb" and enlarged webbing between the toes during the breeding season.

Antifreeze protects from cold: North American wood frog

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The Biomimicry Institute
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The blood of the North American wood frog helps it survive freezing temperatures for as long as seven months via a natural antifreeze.

   
  "The North American wood frog (Rana sylvatica), for instance, can survive freezing temperatures for as long as seven months, relying on a natural antifreeze in its blood to protect its organs." (Morell 2001)
  Learn more about this functional adaptation.
References
  • Virginia Morell. 2001. The fragile world of frogs. National Geographic. 199(5): 106-23.
"Rana sylvatica LeConte, 1825". Encyclopedia of Life, available from "http://www.eol.org/pages/331212". Accessed 22 Mar 2010.