The difference in sketched hair may be reflected in the length, density, texture and curvature of the hair. The hair of different animals has unique characteristics, so when painting, it is necessary to depict the characteristics of the animal.

If you can only draw eagle feathers but not lion hair, it may be because you are not familiar with the characteristics of lion hair, or your painting skills need to be further improved. Here are some suggestions to help you better master the technique of sketching hair:

1. Observe and study: Carefully observe the hair of different animals, paying attention to its characteristics such as length, density, texture, and curvature. Try looking at hair from different angles to better understand its structure.

2. Practice and practice: Improve your painting skills through continuous practice. Experiment with different strokes and lines to express the texture and layering of the hair.

3. Learn and learn from: Refer to the works of other artists and learn how they depict hair. You can get inspiration and tips from their work.

4. Patience and care: Sketching hair requires patience and care. Don't rush, paint each hair slowly and pay attention to the details. 5. Experiment and innovate: Don’t be afraid to try new techniques and methods. Through continuous practice and innovation, you will find that your painting style and skills continue to improve.