"The most hateful sight of all was the lice crawling on their clothes. I could see distinctly the limbs of these vermin with my naked eyes, much better than those of an European louse through a microscope, and their snouts with which they rooted like swine."
–Johnathan Swift, Gulliver's Travels, 1726
Bug Hunting allows combat with both crickets and spiders. Crickets for the fresh and curious pilgrim. Spiders for only the weary and battle hardened one. Bug Hunting also grants the knowledge to craft a slingshot so one may engage them at range and the stomp ability for when they get close.
You will need to use a Slingshot or a well-timed Stomp in order to initiate combat with Spiders or Crickets since they will run away. Don't hunt Spiders unless you can one-hit kill them, or have enough Blood to survive several hits.