Nyktinastic
Nyktinastic refers to the behavior of animals that are active during the night, also known as nocturnal. This term is derived from the Greek words "nyx" meaning night and "kinesis" meaning movement. Nyktinastic animals are often associated with low light levels and reduced visibility, which can be advantageous for hunting, avoiding predators, or conserving energy. Examples of nyktinastic animals include owls, bats, and certain species of insects. The opposite of nyktinastic behavior is diurnal, which refers to animals that are active during the day. Some animals, such as raccoons and foxes, exhibit crepuscular behavior, being active during both dawn and dusk. The study of nyktinastic behavior is important in understanding the ecological roles and adaptations of nocturnal species.