Crepuscular is a term used to describe some animals that are primarily active during twilight Twilight is the time between dawn and sunrise, and between sunset and dusk. Sunlight scattered in the upper atmosphere illuminates the lower atmosphere, and the surface of the Earth is neither completely lit nor completely dark. The sun itself is not actually visible because it is below the horizon. Owing to the unusual quality of the ambient, that is at dawn Dawn is the time that marks the beginning of the twilight before sunrise. It is recognized by the presence of weak sunlight, while the sun itself is still below the horizon. Dawn should not be confused with sunrise, which is the moment when the leading edge of the sun itself appears above the horizon and at dusk Dusk is the beginning of darkness in the evening, and occurs after twilight, when the sky generally remains bright and blue. Civil dusk is when the center of the sun reaches 6° below the horizon. This marks the end of the evening civil twilight, the point where artificial illumination is required to read outside. It can be confused with sunset,.[1] The word is derived from the Latin Latin or sometimes Roman is an Italic language originally spoken in Latium and Ancient Rome. Although often considered a dead language, in view of the fact that it has no native speakers, a small number of scholars can fluently speak it and it continues to be taught in schools and universities and has been, and currently is, used in the process of word crepusculum, meaning "twilight."[1] Crepuscular is thus in contrast with diurnal Diurnality is an animal behavior characterized by activity during the day and sleeping at night. Animals that are not diurnal might be nocturnal or crepuscular (active primarily during twilight, i.e., at dusk and dawn). Many animal species are diurnal, including many mammals, insects, reptiles and birds. The diurnal pattern is often controlled and nocturnal Nocturnality is an animal behavior characterized by activity during the night and sleeping during the day. The opposite is diurnality. The intermediate crepuscular schedule is also common. Some species are active both in daytime and at night. Living at night can be seen as a form of niche differentiation, where a species' niche is partitioned not behavior. Crepuscular animals may also be active on a bright moonlit night. Many animals that are casually described as nocturnal are in fact crepuscular.[2] Within the definition of crepuscular are the terms matutinal Matutinal is a term used in the life sciences, to describe an organism that is only or primarily active in the pre-dawn hours or early morning. The variant term matinal is used apparently only in entomology, often used in literature on the natural history and ecology of bees. There are numerous genera and species of bees which exhibit this (or "matinal") and vespertine, denoting species active in the dawn Dawn is the time that marks the beginning of the twilight before sunrise. It is recognized by the presence of weak sunlight, while the sun itself is still below the horizon. Dawn should not be confused with sunrise, which is the moment when the leading edge of the sun itself appears above the horizon and dusk Dusk is the beginning of darkness in the evening, and occurs after twilight, when the sky generally remains bright and blue. Civil dusk is when the center of the sun reaches 6° below the horizon. This marks the end of the evening civil twilight, the point where artificial illumination is required to read outside. It can be confused with sunset, respectively.
The patterns of activity are thought to be an antipredator adaptation Antipredator adaptations are evolutionary adaptations developed over time, which assist prey organisms in their constant struggle against their predators. There are several ways antipredator adaptations can be classified, such as behavioral or non-behavioral or by taxonomic groups. Many predators forage most intensely at night, while others are active at mid-day and see best in full sun. Thus the crepuscular habit may reduce predation. Additionally, in hot areas, it may be a way of avoiding thermal stress while capitalizing on available light.
Short-eared OwlA number of familiar mammal Mammals are a class of vertebrate, air-breathing animals whose females are characterized by the possession of mammary glands while both males and females are characterized by hair and/or fur, three middle ear bones used in hearing, and a neocortex region in the brain. Some mammals have sweat glands, but most do not species are crepuscular, including cats The cat , also known as the domestic cat or housecat to distinguish it from other felines and felids, is a small domesticated carnivorous mammal that is valued by humans for its companionship and ability to hunt vermin and household pests. Cats have been associated with humans for at least 9,500 years, and are currently the most popular pet in the, dogs The dog is a domesticated form of the gray wolf, a member of the Canidae family of the order Carnivora. The term is used for both feral and pet varieties. The domestic dog has been one of the most widely kept working, hunting and companion animals in human history[3], rabbits Rabbits are small mammals in the family Leporidae of the order Lagomorpha, found in several parts of the world. There are seven different genera in the family classified as rabbits, including the European rabbit , cottontail rabbits (genus Sylvilagus; 13 species), and the Amami rabbit (Pentalagus furnessi, an endangered species on Amami Ōshima,, ferrets The ferret is a domesticated mammal of the type Mustela putorius furo. Ferrets are sexually dimorphic predators with males being substantially larger than females. They typically have brown, black, white, or mixed fur, have an average length of 20 inches including a 5 inch (13 cm) tail, weigh about 1.5–4 pounds (0.7–2 kg), and have a natural, guinea pigs The guinea pig , also commonly called the cavy, is a species of rodent belonging to the family Caviidae and the genus Cavia. Despite their common name, these animals are not pigs, nor do they come from Guinea. They originated in the Andes, and studies based on biochemistry and hybridization suggest they are domesticated descendants of a closely, and rats Rats are various medium-sized, long-tailed rodents of the superfamily Muroidea. "True rats" are members of the genus Rattus, the most important of which to humans are the black rat, Rattus rattus, and the brown rat, Rattus norvegicus. Many members of other rodent genera and families are also referred to as rats, and share many. Other crepuscular mammals include red pandas The Red Panda is a small arboreal mammal and the only species of the genus Ailurus. Slightly larger than a domestic cat, it has reddish-brown fur, a long, shaggy tail, and a waddling gait due to its shorter front legs. It eats mainly bamboo, but is omnivorous and may also eat eggs, birds, insects, and small mammals. It is a solitary animal, mainly, deer Deer are the ruminant mammals forming the family Cervidae. They include for example Moose, Red Deer, Reindeer, Roe and Chital. Male deer of all species but the Chinese Water deer and female reindeer grow and shed new antlers each year. In this they differ from permanently horned animals such as antelope; these are in the same order as deer and may, moose The moose or European elk (Europe) (Alces alces) is the largest extant species in the deer family. Moose are distinguished by the palmate antlers of the males; other members of the family have antlers with a "twig-like" configuration. Moose typically inhabit boreal and mixed deciduous forests of the Northern Hemisphere in temperate to, chinchillas Chinchillas are crepuscular rodents, slightly larger and more robust than ground squirrels, and are native to the Andes mountains in South America. Along with their relatives, viscachas, they comprise the family Chinchillidae, the common mouse A mouse is a small mammal belonging to the order of rodents. The best known mouse species is the common house mouse (Mus musculus). It is also a popular pet. In some places, certain kinds of field mice are also common. This rodent is eaten by large birds such as hawks and eagles. They are known to invade homes for food and occasionally shelter, skunks Skunks are mammals best known for their ability to secrete a liquid with a strong, foul-smelling odor. General appearance ranges from species to species, from black-and-white to brown or cream colored. Skunks belong to the family Mephitidae and to the order Carnivora. There are 10 species of skunks, which are divided into four genera: Mephitis ,, wombats Wombats are Australian marsupials; they are short-legged, muscular quadrupeds, approximately 1 metre in length with a very short tail. They are found in forested, mountainous, and heathland areas of south-eastern Australia and Tasmania. The name wombat comes from the Eora Aboriginal community who were the original inhabitants of the Sydney area, quolls, Spotted Hyena The Spotted Hyena also known as Laughing Hyena, is a carnivorous mammal of the family Hyaenidae, of which it is the largest extant member. Though the species' prehistoric range included Eurasia extending from Atlantic Europe to China, it now only occurs in all of Africa south of the Sahara save for the Congo Basin. Spotted hyenas live in large and capybaras The capybara , also known as capibara, chigüire in Venezuela, Colombia, and Ecuador ronsoco in Peru, chigüiro, and carpincho in Spanish, and capivara in Portuguese, is the largest living rodent in the world. Its closest relatives are agouti, chinchillas, coyphillas, and guinea pigs. Its common name, derived from Kapiÿva in the Guarani language,. Crepuscular birds include the Common Nighthawk, Chimney Swift, American Woodcock, and Spotted Crake.
Some animals that are extinct were also crepuscular, such as the Tasmanian Tiger The thylacine (binomial name: Thylacinus cynocephalus; Greek for "dog-headed pouched one") was the largest known carnivorous marsupial of modern times. It is commonly known as the Tasmanian tiger (because of its striped back), the Tasmanian wolf, and colloquially the Tassie tiger or simply the tiger. Native to continental Australia,.
Some species have different habits in the absence of predators In ecology, predation describes a biological interaction where a predator feeds on its prey (the organism that is attacked). Predators may or may not kill their prey prior to feeding on them, but the act of predation always results in the death of its prey and the eventual absorption of the prey's tissue through consumption. The other main. For example, the Short-eared Owl is crepuscular on those of the Galápagos Islands The Galápagos Islands are an archipelago of volcanic islands distributed around the equator in the Pacific Ocean, 972 km (525 nmi) west of continental Ecuador, of which they are a part. It is a UNESCO World Heritage site: wildlife is its most notable feature that have buzzard species, but diurnal on those without.
Many moths A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth , with thousands of species yet to be described. Most species of moth are nocturnal, but there are crepuscular and diurnal species, beetles Beetles are the group of insects with the largest number of known species. They are classified in the order Coleoptera , which contains more described species than in any other order in the animal kingdom, constituting about 25% of all known life-forms. About 40% of all described insect species are beetles (about 400,000 species), and new species, flies True flies are insects of the order Diptera . They possess a pair of wings on the mesothorax and a pair of halteres, derived from the hind wings, on the metathorax, and other insects Insects are a class within the arthropods that have a chitinous exoskeleton, a three-part body (head, thorax, and abdomen), three pairs of jointed legs, compound eyes, and two antennae. They are among the most diverse group of animals on the planet and include more than a million described species and represent more than half of all known living are crepuscular as well.
See also
- Nocturnality Nocturnality is an animal behavior characterized by activity during the night and sleeping during the day. The opposite is diurnality. The intermediate crepuscular schedule is also common. Some species are active both in daytime and at night. Living at night can be seen as a form of niche differentiation, where a species' niche is partitioned not
- Diurnality Diurnality is an animal behavior characterized by activity during the day and sleeping at night. Animals that are not diurnal might be nocturnal or crepuscular (active primarily during twilight, i.e., at dusk and dawn). Many animal species are diurnal, including many mammals, insects, reptiles and birds. The diurnal pattern is often controlled
- Matutinal Matutinal is a term used in the life sciences, to describe an organism that is only or primarily active in the pre-dawn hours or early morning. The variant term matinal is used apparently only in entomology, often used in literature on the natural history and ecology of bees. There are numerous genera and species of bees which exhibit this
- Vespertine (biology)
References
- ^ a b Winn, Philip (2001), Dictionary of Biological Psychology, Taylor & Francis, p. 194, ISBN The International Standard Book Number is a unique numeric commercial book identifier based upon the 9-digit Standard Book Numbering (SBN) code created by Gordon Foster, now Emeritus Professor of Statistics at Trinity College, Dublin, for the booksellers and stationers W.H. Smith and others in 1966 0415136067
- ^ [1]
- ^ The ecology of stray dogs: a study of free-ranging urban animals By Alan M. Beck p.12
Categories: Ethology Categories: Behavioural sciences | Subfields of zoology | Night
Personal tools
- New features
- Log in / create account
Namespaces
- Article
- Discussion
Variants
Views
- Read
- Edit
- View history
Actions
Navigation
- Main page A man engaged in waterskiing, a sport in which an individual is pulled behind a boat or a cable ski installation on a body of water, skimming the surface. Waterskiing is a relatively young sport, having been invented in the early 20th century. The skis this person is wearing are specialized for ski jumping
- Contents A portal is an introductory page for a given topic. It complements the main article of the subject by introducing the reader to key articles, images, and categories that further describe the subject. They also include to-do lists that are used mostly by Wikipedia's editors
- Featured content Featured content represents the best that Wikipedia has to offer. These are the articles, pictures, and other contributions that showcase the polished result of the collaborative efforts that drive Wikipedia. All featured content undergoes a thorough review process to ensure that it meets the highest standards and can serve as an example of our
- Current events Worldwide current events | Topic-specific: Science and technology | Sports
- Random article
Interaction
- About Wikipedia
- Community portal
- Recent changes
- Contact Wikipedia
- Donate to Wikipedia
- Help
Toolbox
- What links here
- Related changes
- Upload file
- Special pages
- Permanent link
- Cite this page
Print/export
- Create a book
- Download as PDF
- Printable version
Languages
- Català
- Deutsch
- فارسی
- Bahasa Indonesia
- Íslenska
- Nederlands
- 日本語