MARTIN SHIELDS / SCIENCE PHOTO LIBRARY MARTIN SHIELDS / SCIENCE PHOTO LIBRARY
The wood frog, Lythobates sylvaticus, or (formerly) Rana sylvatica, is a terrestrial frog found in the NE United States and across Canada, into Alaska. It is the only frog found above the Arctic Circle. In winter much of its body freezes and metabollism completely stops. Intracellular freezing is prevented by the accumulation of anti-freeze molecules such as glucose and urea.
Model release not required. Property release not required.