Circadian rhythm
The navigation of the fall migration of the Eastern North American monarch butterfly ("Danaus plexippus") to their overwintering grounds in central Mexico uses a time-compensated sun compass that depends upon a circadian clock in their antennae. Circadian rhythm is also known to control mating behavior in certain moth species such as "Spodoptera littoralis", where females produce specific pheromone that attracts and resets the male circadian rhythm to induce mating at night.