A spider (Gelanor siquirres) that hunts other spiders has a unique approach:
"A novel prey capture strategy in pirate spiders (Araneae: Mimetidae)" by Barrantes et al. 2023 https://www.sciencedirect.com/science/article/pii/S0003347223001665
"Here we describe the capture web and attack behaviour of the pirate spider Gelanor siquirres. The capture web consists of long, dry silk lines that the spider lays downwards from its retreat to the nearby vegetation, as night falls. These lines serve as substrate for silk lines (floating lines) of other nocturnal spiders that begin web construction during the same period. If an exploring spider attaches its floating line to the silk line of the pirate spider's web, then the exploring spider walks along its line to the pirate spider's line. As the pirate spider perceives the exploring spider on its web, it descends from the retreat and attacks the exploring spider."