Can common frogs survive in freezing temperatures?

Yes, they can. Common frogs have antifreeze-like glucose compounds in their blood that allow them to tolerate surprisingly low temperatures and even survive being partially frozen.

How long does it take for frogspawn to become a frog?

It takes roughly six months from spawn to froglet. At high altitudes this timeline becomes critical because tadpoles need to complete their development before winter frosts arrive, and cold weather can add weeks to the process.

What's the highest altitude where frogs breed in Britain?

There's no absolute limit, but breeding populations drop off noticeably around 600 metres. In Scotland, they've been recorded breeding above 700 metres, though at those heights it becomes increasingly difficult for tadpoles to develop fast enough before winter.

Meet the Wild Locals

The Common Frog Altitude Limit: When Amphibians Spawn at 600 Metres

Common frogs breed in hill tarns and boggy pools well above the tree line, which means their tadpoles are racing to develop legs before the water freezes again in October. The adults spend the rest of the year eating slugs in damp grass and being surprisingly tolerant of cold.

3 August 20268 min read