Mating time has started again.....

It's february, still winter, but mating among frogs has already begun after the winter hibernation.

As you can see in my picture, during the mating season the skin of the brown frog has discoloured to some kind of whitish-grey.

English name : Brown frog
Dutch name : Bruine kikker
German name : Grasfrosch
Latin name : Rana temporaria