Nature is the ultimate arms-race.
Look up the Portea Spider: It has a genetic knowledge of the behavior of other spiders and knows how to walk all kinds of web it has not spun. It can imitate the sounds, look and vibrations on a spider's web of anything from ants to a caught animal by trapping an animal as bait or by shredding leaves into a thick heavy pulp that rips holes in webs.
For their size, their intelligence and ability to adapt on the fly to any situation makes them the greatest enemy of any other spider: from humble garden spiders, black widows, taranchulas: The Portea hunts all of them.