The reason why frogs lay eggs in spring

Because it is warmer in spring, frogs are afraid of cold and drought.

The reproductive characteristics of frogs are hermaphroditism, fertilization in water and oviposition. The breeding time is about the middle and late April of each year. In the process of breeding, frogs have a very special phenomenon-hugging each other. It should be noted that the frog hug is not mating, but a link in the breeding process. Studies have shown that if male and female frogs are artificially separated (that is, there is no hugging process), then even during the breeding period of frogs, female frogs cannot excrete eggs. It can be seen that the biological significance of cuddling is that it can promote female frog ovulation. Generally, frogs lay eggs and fertilize in water. After hatching, the egg becomes a tadpole, lives in the water, and then becomes a young frog ashore. However, tree frogs lay eggs in different ways. The eggs laid by tree frogs with spotted legs are like a mass of white soap bubbles and a mass of cream, which are attached to aquatic plants. The most interesting thing is the Emei tree frog, which lays its eggs on leaves near the water. The egg develops in the egg and then falls into the lake to continue its development. Another example is the piano frog, which sings very sweetly. Before laying eggs, it will build a mud nest and then lay eggs in it. Some frogs belonging to tree frogs don't climb trees, but live in water.