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The common adjective is "nocturnal", versus diurnal meaning the opposite. Nocturnal creatures generally have highly developed senses of hearing , smell , and specially adapted eyesight . [ 1 ] Some animals, such as cats and ferrets , have eyes that can adapt to both low-level and bright day levels of illumination (see metaturnal ).
The opposite of a night owl is an early bird — a lark as opposed to an owl — which is someone who tends to begin sleeping at a time that is considered early and also wakes early. Researchers traditionally use the terms morningness and eveningness [ 1 ] for the two chronotypes , or diurnality and nocturnality in animal behavior.
Sleep inversion may be a symptom of elevated blood ammonia levels [2] and is often an early symptom of hepatic encephalopathy. [3] Sleep inversion is a feature of African trypanosomiasis, after which the disease takes its common name, "African sleeping sickness"; [4] sleep-wake cycle disturbances are the most common indication that the disease has reached the stage where infection spreads into ...
This is distinguished from diurnal and nocturnal behavior, where an animal is active during the hours of daytime and of night, respectively. Some crepuscular animals may also be active by moonlight or during an overcast day. Matutinal animals are active only after dawn, and vespertine only before dusk.
Nocturnal Animals ending: What happens to Edward and Susan? Susan continues to read Edward's novel. In the story, one of the three men who abducted and murdered Laura and India has been killed in ...
A 2007 survey of over 55,000 people found that chronotypes tend to follow a normal distribution, with extreme morning and evening types on the far ends. [6] There are studies that suggest genes determine whether a person is a lark or an evening person in the same way it is implicated in people's attitude toward authority, unconventional behavior, as well as reading and television viewing ...
Nocturnal arousal etc. could be explained by creatures causing otherwise guilt-producing behavior. Add to this the common phenomena of nocturnal arousal and nocturnal emission, and all the elements required to believe in an incubus are present. [13] Additionally, some crimes of sexual assault were likely passed off as the actions of incubi.
For nocturnal mammals, this is reversed with the densely packed DNA in the center of the nucleus, which reduces the scattering of light. [52] Some nocturnal animals have a mirror, the tapetum lucidum, behind the retina. This doubles the amount of light their eyes can process. [53] Nocturnal insects drawn to an artificial light