Like the upis beetle, wood frogs don’t fight winter, they embrace it. The specially equipped frogs range from Georgia to the Arctic Circle. Researchers have found that those northerly dwelling wood frogs can survive even the harshest winters—enduring temperatures as low as 0 degrees Fahrenheit for up to seven months.
How? They just freeze. More than two-thirds of the wood frog’s body fluids become a solid, and their heart even stops pumping.
“On an organismal level they are essentially dead,” Don Larson, a graduate student at the University of Alaska, Fairbanks, told the Los Angeles Times. “The individual cells are still functioning, but they have no way to communicate with each other.”
As long as no more than 65 percent of its total body water freezes, the wood frog will thaw out in spring and hop away unscathed.
(Photo: Andrew McLachlan/Getty Images)