Why do some frogs make strange noises?

1. Frogs often live in rivers, ponds and rice fields, mainly in the grass near the water, and sometimes they can also lurk in the water. Most of them are active at night and feed on insects. It mainly feeds on some agricultural pests, and each frog eats more than 60 kinds of pests every day. Frogs living in ponds with overgrown water plants are grass green, but in ditches without green grass, they are grayish brown. Frog's body color is consistent with the environment color, which can play a very good protective role, so as to better live in water and land.

2. Zoologists find that different calls represent different meanings. In summer, the male frog makes a loud sound, which represents the courtship signal; Frogs make deafening noises when dividing territory, which shows that they are controversial.

According to research, frogs rely on a pair of vocal cords in their throats to make sounds. If the vocal cords are strained by the surrounding muscles and cartilage, the air will vibrate when it passes.

Extended data

The reproductive characteristics of frogs are hermaphroditism, which is fertilized in water and belongs to spawning. 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 the male frog and the female frog are separated artificially (that is, there is no hugging process), then even during the breeding period of the frog, the female frog cannot excrete eggs. Thus, the biological significance of cuddling is that it can promote ovulation of female frogs. Generally speaking, frogs lay eggs and fertilize in water. After hatching, the eggs become tadpoles, live in the water, and then land as young frogs. However, tree frogs lay eggs in different ways. The eggs laid by the spotted-legged tree frog 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, whose song is very sweet. Before laying eggs, it will build a mud nest and then lay eggs in it. Some frogs belonging to tree frogs can't climb trees, but live in water. Some tree frogs, such as the red webbed tree frog and the black webbed tree frog, have wide webbed feet between their fingers and toes, which can extend the webbed feet from high branches to low branches, so they are also called flying frogs. Besides tree frogs, frogs with suckers include rain frogs and rushing frogs. Among them, rapids are special. They like to live in fast-flowing waters, and can quickly cross the rapids and climb rocks. The tadpoles of the turbulent frog are also very strange. There is a sucker in its abdomen, which can be adsorbed on the rock to avoid being washed away by the rapids. Toad is a rare frog species unique to China, which first appeared in Emei Mountain and was later found in several southern provinces. The snout of this frog is wide, round and flat, and the male maxillary margin has 12- 16 pyramid-shaped horny black thorns, so it is called moustached toad. The function of these "beards" is still under study. There are many kinds of frogs, but no matter which kind, they mainly feed on pests.