Calling sites are usually in the lower branches of trees near the water's edge ... a sound like quacking ducks may be heard in forest ponds and beaver flows. This is the wood frog, the first of the ...

According to a study led by Don Larson of the University of Alaska Fairbanks, wood frogs (Lithobates sylvaticus) freeze up to 60 percent of their bodies during the long and extremely cold Alaskan ...

We found that over the course of just 10 generations, these wood frogs evolved a much higher salt tolerance." The research ...