Frogs are frogs, beneficial insects and are protected. Catching frogs is easy. You need a bamboo pole, a silk thread, and a small ball of cotton. Tie the silk thread to the bamboo pole like a fishing rod. Then use the cotton as bait, tie it to the silk thread, put it into the water, wet the cotton, and when there are frogs place, let the cotton swing up and down in front of the frog at a frequency of once per second within a spatial distance of 15 cm, and the frog will bite it and hold on.