Amazing specialization. I was wondering the same thing. Cave glow worms cast a "fishing line," and this is similar-ish. I wonder if N million years ago, a couple of fishing-line-like spiders started anchoring their lines, and the ones with a more conic shape anchor may led to more success over time. And the anchor may have only worked on territorial prey. Fun stuff to imagine.
Just saw glow worms for the first time last month. Very cool critters. Not sure I even knew they existed before that.
Me too! I was visiting my parents’ farm and walking around in pitch black while looking at the stars when I saw a bright green glow out of the corner of my eye. Ended up tracking it down to a California pink glow worm that had perched itself on a rock.