The knowledge about swallows can be understood from their living habits, species and cultural significance.

1. Swallow's living habits: Swallows like to live in the environment where human beings live. They usually nest under the eaves and reproduce. Swallows are good at flying and have long and narrow wings. They can fly quickly and turn flexibly. They like to catch insects and flying insects, mainly carnivorous birds. Swallows also like to perch on wires, which may be because they can use electric fields to sense the surrounding magnetic fields, so as to find food and direction.

2. Types of Swallows: There are many types of swallows, and there are more than 70 known swallows in the world. Different species of swallows have different appearance characteristics and distribution areas. Domestic swallow is a common swallow. They are small in size and narrow in wings, which are suitable for catching insects in flight. Jin Siyan is a swallow with large body and wide wings, mainly distributed in Asia, and its nest is a precious tonic.

3. Cultural significance of swallows: Swallows have important symbolic significance in many cultures. In China culture, swallows are regarded as messengers of spring, representing the beginning of vitality, hope and beauty. In western culture, swallows are endowed with the symbolic meaning of freedom, lightness and elegance. Swallows often appear in literary works and become an important symbol for people to express their feelings and thoughts.

Life habits of swallows:

1. Nesting: Swallows usually nest in the environment where humans live. They will nest under the eaves or branches. The nest is round or semi-circular, mainly composed of soil and grass stems.

2. Feeding habits: Swallows feed on insects. They are good at catching flying insects in the air, such as mosquitoes and flies. Swallows' mouths are suitable for catching small insects, and they also like to eat small invertebrates, such as spiders and worms.

3. Migration: Swallows are migratory birds. They fly to the south in winter and return to the north in spring. Different kinds of swallows migrate at different distances and times.

4. Sociality: Swallows are social animals and usually form large groups to live and fly together. This kind of social behavior helps them gain more advantages in predation and defense.

5. Flying ability: Swallows have very strong flying ability. They can fly quickly and make various flexible movements in the air, such as hovering in the air and turning quickly.

6. Breeding: Swallows generally breed in spring, laying 2-7 eggs, and the incubation period is about 14- 19 days. After the chicks are born, swallows will raise them together until they can live independently.