1. The singing of birds: The euphemistic singing of birds can bring wonderful music enjoyment and make people feel happy and relaxed.

2. Beauty of birds: Many birds have bright feathers and unique shapes, and their beauty can bring people visual enjoyment and inspiration for artistic creation.

3. Bird interaction: By observing the interaction and behavior of birds in the natural environment, people can feel the magic and vitality of nature.

4. Bird photography: For photographers, shooting birds can bring them a lot of fun and challenges. By photographing birds, people can capture beautiful moments and express their artistic feelings and creativity.

5. Cultural significance of birds: In many cultures, birds are symbolic, such as dragons and phoenixes, which have a special position in China culture. By understanding the cultural significance of birds, people can enhance their understanding and appreciation of culture.

6. Health and Fitness: When walking or running in parks or forests, people can observe various birds and enjoy the health and fitness benefits brought by outdoor sports.

In short, birds can bring a lot of happiness to people from the biological, ecological, cultural and artistic perspectives.