Butterflies use their antennae to sense the air for wind and scents. The antennae contain sensory organs known a sensillae. The shape, color, and structure of the antennae vary from species to species, even though their function remains the same. Butterflies that belongs to the family Hesperiidae have their antenna tip, modified into a narrow, hook-like projection. These butterflies are popularly known as skippers.

Butterflies taste their food with the help of sensory cells called chemoreceptors, located on their feet. Many butterflies use chemical signals, called pheromones. Vision is well developed in butterflies, and most species are sensitive to the ultraviolet spectrum. Some species of butterflies have color vision. Some have organs of hearing, and some others make stimulatory and clicking sounds.