Why did toad come out in three days and nine days? I come from the north. I saw a lazy toad crawling on the ice in my fish pond today. Why?

According to the introduction of the Dictionary of Juvenile Nature, toads "hibernate in underwater mud, rotten grass or land caves in winter, and sting in the south 1 to February, and sting in the north from March to April. After the sting, they mate intensively near the pond and lay eggs in the water. The eggs are black, arranged in a few meters or even longer egg belt, wrapping the plants on the water. "

According to the introduction of these materials and our local actual situation, it turns out that in our place, the activities of toads on March 9 are a reflection of normal living habits, not a precursor to earthquakes.