The moor frog, it changes color from a boring brown to an azure blue, just to be able to distinguish between genders during mating season. The ‘before’ and ‘after’ pictures are really quite unbelievable – it looks they’re two different frogs.
There is an obvious lack of dimorphism in this species – both male and female frogs look pretty much the same. So, as thousands of moor frogs gather at the ponds, it becomes quite difficult for them to differentiate between the sexes. And nature has a perfect answer to this dilemma – the males magically transform their bodies to an attractive shade of blue.
The males arrive at the shallowest ends of the ponds before the females. They turn blue for just a week and let out their mating calls, waiting for their partners to arrive. When the females finally decide to make an appearance, the males move around a lot, eager to find their potential mates. When a suitable female is spotted, they rush towards her all at once. In all the confusion, it’s actually quite easy to make a mistake. But despite all the color change, the males do end up choosing the wrong partner at times!
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