2019-6-22 · A bolas spider is any of several species of orb-weaver spider that, instead of spinning the typical web, hunt by using a sticky 'capture blob' of silk on the end of a line, known as a 'bolas'. By swinging the bolas at flying male moths or moth flies[1] nearby, the spider may snag its prey rather like a fisherman snagging a fish on a hook ...