There is a kind of calligraphy called bird. How to write?

Refers to the bird insect print, also called bird book or bird insect book. It belongs to a kind of seal script. As for the writing method, there is no way to answer this question. You must first understand the brushwork of seal script, and you can refer to the brushwork of big seal script. You can look for related techniques and calligraphy theory. If you can write seal script, especially big seal script, then there is no problem. Just write it in the style of seal script. Note that it is not drawn, but written one by one.