While hiking a remote trail along Little Beaver Creek in Columbiana County last Sunday with Jim Dolan, a Wood Frog suddenly popped from cover and had the good graces to bound onto an emerald moss blanket.
No amphibian ranges further north than do tiny Wood Frogs. They survive and thrive all the way to the tundra. The black-masked hoppers can freeze nearly solid, and thanks to the production of what is essentially an anti-freeze chemical, they readily thaw back out and are good as new.
While there are plenty of formidable amphibians, such as the devilish Two-toed Amphiumas of the deep south, the miniature Wood Frog gets my vote as toughest amphibian.