Entomology is the study of insects. With this skill you can choose the career mission Gather insects, buy an insect net and move to a locale where insects are among its resources (for instance, a countryside), and you will start collecting whatever species exist there (but skill up somewhat first).

You can learn about this skill from the item or book Entomology for Everyone.

You can learn about this skill in a school or university which offers a class in it, or you can learn it from an apprenticeship with a master.