Common frog

Rana temporaria
True frogs (Ranidae)

CC-BY-SA 2.0 rights : Laurent Lebois

Brown marked frog with a dark brown line starting from the nose, over the eyes and cheeks, and down to the front leg. There are many variations in colour and markings, the ♀ is often more red-brown. A light coloured belly, striped legs and slightly thickened back stripes. 
The eardrum is ¾ the eye size.

In mating season the flanks of the ♀ turn yellow with red markings, the ♂ becomes grey-blue, but not as blue as the Moor frog. The ♂ sounds like grunting. 

⇔ l. 7-10 cm

LA:
≈ Very similar to the RANA ARVALIS (Moor frog) whose nose is more pointed. 
≈ The RANA DALMATINA (Agile frog) has a triangularly shaped eardrum of approx. the eye size.

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