I have every developmental stage of Stenolemus lanipes creeping about the back wall. I had noticed that even the smallest sought out spider webs, but I never saw any scavenging. Just out of frame in this shot, there is an immature that I had seen under this large spider's web. It seemed a precarious position. Checking back, I discovered this adult had successfully captured and killed the web owner. Last night, I saw another adult, seemingly twanging a sparse web, and it appeared that he was trying to draw forth a spider. It's been interesting to watch.