BBC Bitesize takes a look at four animals who live in the wildest of environments ... the wood frog stays on the forest floor. In order to stay alive, the wood frog collects glucose in its tissues.

Animals that live in cold environments need to reduce heat loss as much as possible ... As the temperature drops, these hardy amphibians nestle down in leaf litter on the forest floor to protect ...

Reintroduction of captive-bred animals has had mixed success. This California butterfly lost habitat to grazing and drought and is considered to be extinct. The last live one was seen in the wild ...

Animals have some amazing adaptations that help them live in even the most hostile environments. Consider camels, for instance. They can thrive in some of the hottest and driest places on Earth. Their ...

“He captures the animals of the forest beautifully, and it’s wonderful to see some of the rarer species that live in the ...