The fact that there are a lot of people out walking around the lake does not disturb the frog spawning, but the males quake enthusiastically to attract the females.

– The important thing for the frogs is to be in stagnant water where there are no fish that can eat the roe, says Sara Byrsten, nature conservation officer at the county administrative board in Norrbotten.

Few survive

Regardless of city or country, the frogs usually return to the same water they themselves were once born in. The frog game thus becomes a tradition in the waters where it once began.

"Frogs are very vulnerable and not many of all tadpoles survive and become adults. It's interesting to go and watch them, I've been down by the lake with my children, but I think you should keep your distance, says Sara Byrsten.

Several of Sweden's amphibians are decreasing in number and some are at risk of extinction. Therefore, all amphibians in Sweden are protected.

In the clip you can see the frog game.