Adult Firefly or "Lightning Bug" – a Crepuscular Beetle
Photuris lucicrescens

Crepuscular is a term used to describe animals that are primarily active during twilight, hence at dawn and at dusk. FireFly is the second single by Essex Alternative rock band InMe. Beetles are the group of Insects with the largest number of known Species. Twilight is the time before Sunrise, called Dawn, and the time after Sunset, called Dusk. ^[1] The word is derived from the Latin word crepusculum, meaning "twilight". Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. ^[1] Crepuscular is thus in contrast with diurnal and nocturnal behavior. In Animal behavior, diurnality indicates an Animal that is active during the Daytime and rests during the Night. As an Animal behavior, nocturnality describes sleeping during the Daytime and being active at Night - the opposite of the diurnal Crepuscular animals may also be active on a bright moonlit night. Many animals that are casually described as nocturnal are in fact crepuscular. Within the definition of crepuscular are the terms matutinal (or "matinal") and vespertine, denoting species active in the dawn and dusk respectively. 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 Vespertine is a term used in the life sciences to indicate something of relating to or occurring in the evening Dawn refers to the Twilight before Sunrise. It is recognized by the presence of weak sunlight while the sun itself is still below the horizon Dusk refers to the period of time following Sunset. Although commonly confused with twilight dusk is the time frame that occurs either before or after a twilight - when the

The patterns of activity are thought to represent a response to selection from predators. 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 Owl

Crepuscular mammals include the red panda, cat, dog, deer, moose, rabbit, chinchilla, ferret, guinea pig, hamster, common mouse, skunk, rat, and capybara. Mammals ( class Mammalia) are a class of Vertebrate Animals characterized by the presence of Sweat glands, including sweat glands The Red Panda, Firefox, Fire Cat, or Lesser Panda, "or Ailurus fulgens ("shining cat" is a mostly herbivorous Mammal WikipediaManual of Style (spelling, articles should conform to one overall spelling style of English typically the one most linked to the article topic (if it is geographic The dog ( Canis lupus familiaris) is a domesticated Subspecies of the gray wolf, a Mammal of the Canidae family of the order A deer is a Ruminant Mammal belonging to the family Cervidae. The moose (North America or elk (Europe Alces alces, is the largest extant Species in the Deer family. Rabbits are small Mammals in the family Leporidae of the order Lagomorpha, found in several parts of the world Chinchillas are rabbit-sized Crepuscular Rodents native to the Andes mountains in South America. The ferret is a domestic Mammal of the type Mustela putorius furo. The Guinea pig (also commonly called the cavy after its scientific name Cavia porcellus) is a species of Rodent belonging to the family Caviidae Hamsters are Rodents belonging to the Subfamily Cricetinae. The subfamily contains about 18 Species, classified in six or seven genera A mouse (plural mice) is a small Animal that belongs to one Skunks (sometimes referred to as polecats) are Mammals best known for their ability to excrete a strong foul-smelling odor. Rats are various medium sized long-tailed Rodents of the superfamily Muroidea Capybara ( Hydrochoerus hydrochaeris) also known as capibara, chigüire in Venezuela chigüiro, carpincho Crepuscular birds include the common nighthawk, American woodcock and spotted crake. The Common Nighthawk, Chordeiles minor, is a Nightjar. The adults have dark with brown grey and white patterning on the upperparts and breast the long wings The American Woodcock, Scolopax minor, is a small chunky shorebird Species from North America. The Spotted Crake ( Porzana porzana) is a small waterbird of the family Rallidae.

Some species have different habits in the absence of predators. For example, the short-eared owl is crepuscular on those of the Galápagos Islands that have buzzard species, but diurnal on those without. The Short-eared Owl ( Asio flammeus) is a species of Typical owl (family Strigidae) A buzzard is one of several large birds but there are a number of meanings as detailed below

Many moths, beetles, flies, and other insects are crepuscular as well. A moth is an Insect closely related to the Butterfly, both being of the order Lepidoptera. Beetles are the group of Insects with the largest number of known Species. True flies are Insects of the Order Diptera ( Greek: di = two and pteron = wing possessing a single pair of Insects ( Class Insecta) are a major group of Arthropods and the most diverse group of Animals on the Earth with over a million described

References

1. ^ ^{a b} Winn, Philip, Dictionary of Biological Psychology, Taylor & Francis, p. 194, ISBN 0415136067 

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