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Crepuscular, a classification of animals that are active primarily during twilight, making them similar to nocturnal animals. Diurnality, plant or animal behavior characterized by activity during the day and sleeping at night. Cathemeral, a classification of organisms with sporadic and random intervals of activity during the day or night.
Sleep can follow a physiological or behavioral definition. In the physiological sense, sleep is a state characterized by reversible unconsciousness, special brainwave patterns, sporadic eye movement, loss of muscle tone (possibly with some exceptions; see below regarding the sleep of birds and of aquatic mammals), and a compensatory increase following deprivation of the state, this last known ...
Northern bat hibernating in Norway Bats hibernating in a silver mine. Hibernation is a state of minimal activity and metabolic depression undergone by some animal species. . Hibernation is a seasonal heterothermy characterized by low body-temperature, slow breathing and heart-rate, and low metaboli
Diurnality, plant or animal behavior characterized by activity during the day and sleeping at night. Cathemeral , a classification of organisms with sporadic and random intervals of activity during the day or night.
The kiwi is a family of nocturnal birds endemic to New Zealand.. While it is difficult to say which came first, nocturnality or diurnality, a hypothesis in evolutionary biology, the nocturnal bottleneck theory, postulates that in the Mesozoic, many ancestors of modern-day mammals evolved nocturnal characteristics in order to avoid contact with the numerous diurnal predators. [3]
Species normally quiescent at night become active day and night during the spawning season. [1] Many parental species forego sleep at night and fan their eggs day and night for many days in a row. This has been observed in threespine stickleback , [ 32 ] convict cichlid and rainbow cichlid , [ 33 ] [ 34 ] various species of damselfish , [ 35 ...
Many types of animals are classified as being diurnal, meaning they are active during the day time and inactive or have periods of rest during the night time. [1] Commonly classified diurnal animals include mammals, birds, and reptiles. [2] [3] [4] Most primates are diurnal, including humans. [5] Scientifically classifying diurnality within ...
Males begin hibernating first, while females that have reproduced start later. [81] During periods of hibernation, the animals average 13 separate bouts of torpor, which are broken up by periods of arousal lasting 1.2 days on average. These interruptions tend to coincide with warmer periods. [81]