Nocturnal

Definition

Active during the night and resting during the day, a behavioral adaptation exhibited by certain insects and arachnids.

Etymology

From Latin 'nocturnus', meaning 'of the night', derived from 'nox', meaning 'night'.

Example

Many moth species are nocturnal, flying and feeding at night while avoiding daytime predators.

Synonyms

• Night-active

Related Terms

• Diurnal
• Crepuscular
• Photoperiodism

Usage Notes

Nocturnal behavior in insects and arachnids helps them avoid daytime predators and may be influenced by temperature and humidity.