What critical sensory function is served by the feathery structure of male moth antennae?

Answer

Detecting pheromones released by potential mates from great distances

The feathery nature dramatically increases the surface area, allowing the moth to efficiently detect pheromones released by potential mates from great distances.

What critical sensory function is served by the feathery structure of male moth antennae?
insectmothanatomycharacteristicphysical