Even before vibrations are detected by its lyriform organs, the web determines which vibrations will arrive at the leg. The spider will eat whatever it’s aware of, and it sets the bounds of its awareness–the extent of its Umwelt–by spinning different kinds of webs. The web, then, is not just an extension of a spider’s senses but an extension of its cognition. In a very real way, the spider thinks with its web. Tuning the silk is like tuning its own mind.