Devon Wildlife Trust Common frogs are amphibians, breeding in ponds during the spring and spending much of the rest of the year feeding in woodland, gardens, hedgerows and tussocky grassland.
They are familiar inhabitants of garden ponds, where they lay their eggs in big 'rafts' of spawn. They feed on a variety of invertebrates and even smaller amphibians.

How to Identify

The common frog varies in colour enormously, from green to brown and even red or yellow. It has smooth skin, a dark 'mask' behind the eye and long back legs, covered in dark bands. It hops and jumps rather than walks, and lays spawn in large jelly-like clumps.

https://www.devonwildlifetrust.org/wildlife-explorer/amphibians/common-frog 

Common Frog in our garden in Chulmleigh, 22nd May 2020 (Grant Sherman)

 

National Biodiversity Network This common species is currently in no danger of extinction, but local populations can be very unstable. Disturbance of breeding ponds, unusually hard freezes, and pollution by herbicides are all known to wipe out the species in a region.

Rana temporaria eats insects, their larvae, wood lice, spiders, snails and worms. They are able to detect worms by smell. Eating habits are greatly influenced by the time of year.

https://species.nbnatlas.org/species/NBNSYS0000005060 

Wikipedia The common frog (Rana temporaria), also known as the European common frog, European common brown frog, or European grass frog, is a semi-aquatic amphibian of the family Ranidae, found throughout much of Europe as far north as Scandinavia and as far east as the Urals, except for most of Iberia, southern Italy, and the southern Balkans. The farthest west it can be found is Ireland. It is also found in Asia, and eastward to Japan.

Common frogs metamorphose through three distinct developmental life stages — aquatic larva, terrestrial juvenile, and adult. They have corpulent bodies with a rounded snout, webbed feet and long hind legs adapted for swimming in water and hopping on land. Common frogs are often confused with the common toad Bufo bufo, but frogs can easily be distinguished as they have longer legs, hop, and have a moist skin, whereas toads crawl and have a dry 'warty' skin. The spawn of the two species also differs in that frogspawn is laid in clumps and toadspawn is laid in long strings.

Outside the breeding season, common frogs live a solitary life in damp places near ponds or marshes or in long grass. They are normally active for much of the year, only hibernating in the coldest months. In the most northern extremities of their range they may be trapped under ice for up to nine months of the year, but recent studies have shown that in these conditions they may be relatively active at temperatures close to freezing. In the British Isles, common frogs typically hibernate from late October to January. They will re-emerge as early as February if conditions are favourable, and migrate to bodies of water such as garden ponds to spawn. Where conditions are harsher, such as in the Alps, they emerge as late as early June. Common frogs hibernate in running waters, muddy burrows, or in layers of decaying leaves and mud at the bottom of ponds or lakes primarily with a current. The oxygen uptake through the skin suffices to sustain the needs of the cold and motionless frogs during hibernation.

https://en.wikipedia.org/wiki/Common_frog 

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