These Zombie Wood Frogs Literally Freeze To Survive the Northern Winter - The Wild Canadian Year
Wood Frog update – Hiker's Notebook
10 Animals That Hibernate - Fact Animal
frogs and toads articles - Encyclopedia of Life
Frozen Frogs « Conserve Wildlife Foundation of New Jersey
Mini Season: Awakening of Insects –
Where Do Frogs Go When It's Cold Outside?
Life Science: Why Don't Frogs Freeze? - Playdough To Plato
How to Care for Pond Frogs Over the Winter