The North American wood frog belongs to a small group of animals that are freeze tolerant. As the temperature drops below freezing each winter, the wood frog drifts into a deep hibernation, its breathing and heartbeat grind to a halt, and as much as 65% of the water in its body gradually crystallizes into ice.
www.exploratorium.edu/frogs/woodfrog/index.html www.exploratorium.edu/frogs/woodfrog/index.html
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killer frog ... Frog eats chipmunk ... Wood Frog Mysteries...
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Wood Frog - Wikipedia, the free encyclopedia
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The Wood frog ( Rana sylvatica ) has a broad distribution over North America, extending from the southern Appalachians to the boreal forest with several notable disjunct populations including lowl...
en.wikipedia.org/wiki/Wood_Frog
Common name: Wood Frog; Scientific name: Rana sylvatica; Code: RASY; Status (BC): Ye ... Wood Frogs are supercool! They are the only North American amphibian that occurs north of the Arctic Circle. They have an incredible ability to survive freezing winter temperatures, and in spring, warm up and hop away!
www.env.gov.bc.ca/wld/frogwatch/whoswho/factshts/woodfr... www.env.gov.bc.ca/wld/frogwatch/whoswho/factshts/woodfrog.htm
The North American wood frog is quite a peculiar animal. Unlike most frogs, the wood frog can be found in Alaska and above the Arctic Circle. As the temperature drops below freezing and as soon as it "just touches an ice crystal", the frog will completely freeze.
www.blogcadre.com/blog/stella/north_american_wood_frog_... www.blogcadre.com/blog/stella/north_american_wood_frog_completely_freezes_for_weeks_and_comes_back_to_life_in_the_spring_2006_09_25_13_59_43
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...
www.asknature.org/strategy/b2f4c8f6a4baa2f0cbbb0d09aa6f... www.asknature.org/strategy/b2f4c8f6a4baa2f0cbbb0d09aa6f62b9
But one exception is the North American wood frog: this is one of the few animals that can recover after freezing solid. When cells freeze they burst and leak. Not so with the wood frog. Its body cells contain more sugar during the winter freeze and, because of this, ice crystals form around the cells but not inside them.
www.naturalsciences.be/museum/exhibitions/xtreme/noflas... www.naturalsciences.be/museum/exhibitions/xtreme/noflash/expo/coldness/fiche1/index_html
Biology of the wood frog (Rana sylvatica) in Manitoba.
www.naturenorth.com/spring/creature/woodfrog/wdfrgcvr.h... www.naturenorth.com/spring/creature/woodfrog/wdfrgcvr.html
We have several of these little frogs in our flowers. These frogs pass our winters frozen solid. Scientists are trying to figure out how they survive with ...
www.flickr.com/photos/12535801@N03/3865863948/
Discussion The only North American frog found north of the Arctic Circle. Primarily diurnal. In the colder parts of its range, the Wood Frog is an explosive breeder. Swarms of pairs lay fertilized eggs within 1 or 2 days, then disappear into the surrounding country.
www.enature.com/fieldguide/showSpeciesRECNUM.asp?recNum... www.enature.com/fieldguide/showSpeciesRECNUM.asp?recNum=AR0033
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