Introduce a beneficial small animal, first say its name, then say how beneficial it is, and finally say how you plan to protect it.

Frogs eat pests and try their best to protect their habitat.

In addition, there are dragonflies, bats, earthworms and sparrows ... in fact, we can't subjectively say which animals are beneficial and which animals are harmful. As far as the whole ecosystem is concerned, every link and every species has an important role in hate. They have reached this relatively stable state because nature has evolved for thousands of years. What we should do is to maintain this stable situation, prevent biological invasion and protect the diversity of ecological species.