Frogs can exist in a wide range of environments, from deserts to snowy mountains. Anurans body temperatures have been recorded from 3°' - 36°'C.

Frogs choose to live in these hostile environment because even though it can be tough, there is less competition for food and fewer predators.

Many frogs hibernate during cold seasons when the temperature can be as low as -7°C. They hide on the ground in leaf litter and under rocks or tree roots.

The Wood Frog, rana sylatica, that lives in N.America and Canada, converts glycogen to glucose in their liver to produce an 'antifreeze'. This means they can tolerate their body fluids freezing in the winter. They become stiff with no breathing or heart beat. Then thaw for the spring.

The Yosemite Toad, Bufo cenorus, walkes high up on tiptoe across snow to get to it's breeding areas.

Heat

Some frogs live in dry areas where water is precious. Many store water in their bladders. They reduce water evaporation by minimising their surface area by closing their eyes and tucking in their limbs or several frog huddling together. Some frogs burrow into the ground to escape dry seasons.

In droughts the Australian Water-holding frog, Cyclorana platycephala, retains it's shed skin to produce a cocoon to reduce water evaporation, then stays like this until better conditions arrive.

The African Foam-nest frog, Chiromantis, can cope with temperatures up to 40°C

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