A bat illustrating nocturnal features.

A nocturnal animal is one that sleeps during the day and is active at night - the opposite of the typical human schedule (diurnal) although some humans have been known to be nocturnal. The intermediate crepuscular schedule (twilight activity) is also common. Some species are active both during the day and night. Image File history File links Please see the file description page for further information. ... Image File history File links Please see the file description page for further information. ... Suborders Megachiroptera Microchiroptera See text for families. ... Look up day in Wiktionary, the free dictionary. ... Melbourne skyline at night Night or nighttime is the period in which the sun is below the horizon. ... A diurnal animal (dī-ŭrnəl) is an animal that is active during the daytime and sleeps during the night. ... Human beings are defined variously in biological, spiritual, and cultural terms, or in combinations thereof. ... Adult Firefly or Lightning Bug – a Crepuscular Beetle Photuris lucicrescens Crepuscular is a term used to describe animals that are primarily active during the twilight. ...

Many species which are otherwise diurnal exhibit some nocturnal behaviour; for example, many seabirds and sea turtles attend breeding sites or colonies nocturnally to reduce the risk of predation (to themselves or their offspring) but are otherwise diurnal. The Sooty Tern is highly aerial and marine and will spend years flying at sea without returning to land. ... Genera Family Cheloniidae (Oppel, 1811) Caretta Chelonia Eretmochelys Lepidochelys Natator Family Dermochelyidae Dermochelys Family Protostegidae (extinct) Family Toxochelyidae (extinct) Family Thalassemyidae (extinct) Sea turtles (Chelonioidea) are turtles found in all the worlds oceans except theArctic Ocean, and some species travel between oceans. ...

Nocturnal animals generally have highly developed senses of hearing and smell, and specially adapted eyesight. In zoos, nocturnal animals are usually kept in special night-illumination enclosures to reverse their normal sleep-wake cycle and to keep them active during the hours when visitors will be attempting to see them. Hearing is one of the traditional five senses, and refers to the ability to detect sound. ... Young boy smelling a flower Olfaction, which is also known as Olfactics is the sense of smell, and the detection of chemicals dissolved in air. ... Visual perception is one of the senses, consisting of the ability to detect light and interpret (see) it as the perception known as sight or naked eye vision. ... Giraffes in Sydneys Taronga Zoo A zoological garden, zoological park, or zoo is a facility in which animals are confined within enclosures and displayed to the public, and in which they may also be bred. ... Circadian rhythm is the name given to the roughly 24 hour cycles shown by physiological processes in plants, animals and cyanobacteria. ...

Some animals, such as cats, have eyes that can adapt to both night and day levels of illumination. Others, e.g. bushbabies and bats, can only function at night. Binomial name Felis catus Linnaeus, 1758 Synonyms Felis lybica invalid junior synonym The cat (or domestic cat, house cat) is a small carnivorous mammal. ... Genera  Otolemur  Euoticus  Galago Galagos, also known as bushbabies or bush babies, are small, nocturnal primates native to continental Africa, and make up the family Galagonidae. ... Suborders Megachiroptera Microchiroptera See text for families. ...

A person who exhibits nocturnal habits is referred to as a Night owl (person) night owl.

Examples

The following animals are generally classified as nocturnal:

• Badger
• Cockroaches
• Flying squirrels
• Fox
• Green Sea Turtle
• Hamsters
• Hedgehog
• some Humans
• Kangaroo rats
• Kiwi
• Loius
• Lumholtz tree-climbing kangaroo
• Moths
• Nightjars
• Oilbird
• Owls
• Potto
• Raccoon
• Red-legged pademelon
• Skunk
• Sugar glider
• Tree frogs
• Western harvest mouse
• Whippoorwill
• White-tailed uromys

Genera  Arctonyx  Melogale  Meles  Mellivora  Taxidea For other uses, see Badger (disambiguation). ... Families Blaberidae Blattellidae Blattidae Cryptocercidae Polyphagidae Nocticolidae Cockroaches (or simply roaches) are insects of the Order Blattodea. ... Two groups of rodents are referred to as flying squirrels. ... This article is about the animal. ... Binomial name Chelonia mydas (Linnaeus, 1758) This page redirects from Chelonia, which is the genus name of this turtle, but has also been used for the order Testudines of all turtles and tortoises. ... This article does not adequately cite its references or sources. ... Genera Atelerix Erinaceus Hemiechinus Mesechinus Paraechinus A hedgehog is any of the small spiny mammals of the subfamily Erinaceinae and the order Erinaceomorpha. ... Human beings are defined variously in biological, spiritual, and cultural terms, or in combinations thereof. ... Species 22, see text Kangaroo rats, genus Dipodomys, are small rodents native to North America. ... Species See text. ... A moth is an insect closely related to the butterfly. ... Genera Nyctiprogne Podager Lurocalis Chordeiles Nyctidromus Phalaenoptilus Siphonorhis Nyctiphrynus Caprimulgus Macrodipteryx Hydropsalis Uropsalis Macropsalis Eleothreptus Eurostopodus Nightjars are medium-sized nocturnal birds with long wings, short legs and very short bills that usually nest on the ground. ... Binomial name Steatornis caripensis Humboldt, 1817 The Oilbird (Steatornis caripensis) is a slim, long-winged bird related to the nightjars. ... Families Strigidae Tytonidae Ogygoptyngidae (fossil) Palaeoglaucidae (fossil) Protostrigidae (fossil) Sophiornithidae (fossil) Synonyms Strigidae sensu Sibley & Ahlquist Owls are a group of birds of prey. ... Binomial name Perodicticus potto (P.L.S. Müller, 1766) The Potto (Perodicticus potto) is a strepsirrhine primate from the Lorisidae family. ... Type species Procyon lotor Linnaeus, 1758 Species Procyon cancrivorus Procyon insularis Procyon lotor A raccoon (also spelled racoon) is a nocturnal mammal in the genus Procyon of the Procyonidae family. ... Genera Conepatus Mydaus Mephitis Spilogale Skunks are mammals, usually with black-and-white fur, belonging to the family Mephitidae and to the order Carnivora. ... Binomial name Petaurus breviceps Waterhouse, 1839 Sugar Glider natural range: Red: Blue: Darkgreen: Yellow: Violet: Lightgreen: Black: The Sugar Glider (Petaurus breviceps), sometimes called the Flying Sugar, is a small gliding possum native to eastern and northern mainland Australia, New Guinea, and the Bismarck Archipelago, and introduced to Tasmania. ... Distribution of Hylidae (in black) Genera See text. ... Binomial name Reithrodontomys megalotis (Baird, 1857) The Western harvest mouse (Reithrodontomys megalotis) is a small neotomine mouse native to southwest British Columbia, most of the western United States extending continously to west Texas, northeast Arkansas, northwest Indiana, southwest Wisconsin, the interior of Mexico to Oaxaca. ... Binomial name Caprimulgus vociferus Wilson, 1812 The Whip-poor-will or whippoorwill, Caprimulgus vociferus, is a medium-sized (22-27 cm) nightjar, a type of nocturnal bird. ...

References

The Nocturnal Society [[1]]