Replies:
I'm guessing that by "how?" you mean where and when? Frogs in the northern
U.S. hibernate in protected places, in mud of ponds and marshes or other
areas, depending on species and habitat. Any good book or web site on
amphibians can answer questions about the physiology of hibernation.
J. Elliott
Frogs burrow below a pond or mud area avoiding any potential frozen ground.
Their metabolism drops substantially and they are able to breath through their skin
for the duration of the winter.
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