Nocturnality

Nocturnality is a behavioral pattern found in many animals in which the animal is active during the night and sleeps or rests during the day; the corresponding adjective is nocturnal, and its opposite is diurnal. Nocturnal animals typically have highly developed hearing and smell and eyesight adapted to darkness: many, such as tarsiers and some owls, have eyes that are large relative to their body size and corneas that are large relative to the eye, both of which increase sensitivity to low light. Some animals, like ferrets, can function in both dim and bright light, while others, such as bushbabies and many bats, are active only at night; nocturnality also lets some wasps avoid hunting in strong sunlight. Diurnal animals, including humans, squirrels, and songbirds, are active mainly by day; crepuscular animals such as rabbits, skunks, and domestic cats are active mainly at twilight and are often mistakenly called nocturnal; and cathemeral animals such as fossas and lions are active at both times. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/