Lau­rence Jarvis from Froglife replies:

BBC Wildlife Magazine - - Your Feedback -

Com­mon frogs have the re­mark­able abil­ity of bury­ing them­selves to depths of 20– 30cm and sur­viv­ing on low lev­els of oxy­gen, which they ab­sorb through their skin. They also have flex­i­ble joints, which al­lows them to squeeze into tight places.

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