This spider fishes for moths using a scent it fakes, not a web

A bolas spider spins no web to catch prey. Instead she manufactures a chemical copy of a female moth's mating pheromone, releases it into the night air, and waits for lovestruck males to fly in close enough. Then she swings a single silk line tipped with a sticky glob and snags them out of the air.

— William G. Eberhard, Aggressive Chemical Mimicry by a Bolas Spider — Science, vol. 198, 1977