European Common Frog (Rana temporaria) lives in temperate forests across Europe and Asia. It feeds on insects and worms. Its conservation status is Least Concern.
Fascinating facts about the European Common Frog
- The common frog lives farther north than any other amphibian in Europe, reaching the Arctic Circle in Scandinavia. Its range stretches from Ireland in the west to Japan in the east, covering most of Europe except the southern peninsulas. This extreme northward tolerance lets the species survive under ice for up to nine months, showing a remarkable ability to thrive.
- Adult common frogs measure just 6 to 9 cm (2.4-3.5 in) long and weigh about 22.7 g (0.80 oz). Some sources note an average length of 7.5-8 cm, highlighting slight variation across populations. Their compact, squat bodies and powerful hind legs enable both agile hopping on land and strong swimming, a dual capability essential for their semi-aquatic lifestyle.
- A female can lay anywhere from a few hundred up to 5,000 eggs, usually in large gelatinous clumps that warm the embryos and protect them from predators. After spawning, the eggs hatch in 2-3 weeks, though another source records a hatch period of 30-40 days. This rapid development is crucial because the larvae must grow fast enough to survive the short summer window before winter arrives.
- Warmer springs are turning ranavirus into a deadlier threat: each 1 °C (1.8 °F) rise lifts frog mortality by more than 3 %. Historically, outbreaks spiked in the 1990s during a warming period, then fell as temperatures cooled in the 2000s. Models now predict the disease could stretch from April to October, endangering not only adults but also the next generation of tadpoles.
- Genetic health drops sharply toward the edges of the frog's range: peripheral populations are both fewer in number and less genetically variable. As latitude increases, subpopulations become more genetically similar, reflecting strong selection for cold-weather thermoregulation.
Sources
Every fact above was checked against these pages, and kept only where one of them states it.
At a glance
RangeEurope and Asia
HabitatTemperate forests
DietInsects and worms
About the European Common Frog
In the misty dawn of a forest glade, the European Common Frog stirs, its slender body unfolding from a nocturnal repose as it begins its daily odyssey, navigating a tapestry of emerald moss and ancient tree roots with an unhurried ease. With each deliberate leap, it traverses its kingdom, a master of stealth and patience, its mottled skin blending seamlessly into the surroundings as it pursues the hidden rhythms of its aquatic realm. As it moves, the frog's very presence seems to embody the essence of the wild, a testament to the enduring beauty of a world where life and landscape are inextricably entwined.
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