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Encyclopedia > Dragonfly
Anisoptera redirects here. For the genus of trees see Anisoptera (tree).
BuTtErFly Dragon
Yellow-winged Darter
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Odonata
Suborder: Epiprocta
Infraorder: Anisoptera
Selys, 1800
Families

Aeshnidae
Austropetaliidae
Cordulegastridae
Corduliidae
Gomphidae
Libellulidae
Macromiidae
Neopetaliidae
Petaluridae Dragonfly may refer to: The Dragonfly, an insect of the order Odonata, suborder Anisoptera DragonFly BSD, a fork of the FreeBSD operating system Dornier Do 12 Libelle III (Dragonfly III in German), a flying boat developed in the 1930s and subsequently used for non-combat purposes by the Luftwaffe in... Image File history File links Download high resolution version (2567x1574, 603 KB) Yellow-winged Darter This image shows an about 1. ... Binomial name Sympetrum flaveolum (Linnaeus, 1758) The Yellow-winged Darter, Sympetrum flaveolum, is a European dragonfly. ... Scientific classification redirects here. ... For other uses, see Animal (disambiguation). ... Subphyla and Classes Subphylum Trilobitomorpha Trilobita - trilobites (extinct) Subphylum Chelicerata Arachnida - spiders,scorpions, etc. ... Orders Subclass Apterygota Archaeognatha (bristletails) Thysanura (silverfish) Subclass Pterygota Infraclass Paleoptera (Probably paraphyletic) Ephemeroptera (mayflies) Odonata (dragonflies and damselflies) Infraclass Neoptera Superorder Exopterygota Grylloblattodea (ice-crawlers) Mantophasmatodea (gladiators) Plecoptera (stoneflies) Embioptera (webspinners) Zoraptera (angel insects) Dermaptera (earwigs) Orthoptera (grasshoppers, etc) Phasmatodea (stick insects) Blattodea (cockroaches) Isoptera (termites) Mantodea (mantids) Psocoptera... Suborders Epiprocta (dragonflies), including infraorder Anisoptera (true dragonflies) Zygoptera (damselflies) Reference: ITIS 101593 as of 2002-07-26 Odonata is an order of insects, encompassing dragonflies (Anisoptera) and damselflies (Zygoptera). ... The Epiprocta (Bechly 1996) is one of the two suborders of the Odonata (the Order to which dragonflies and damselflies belong). ... Baron Michel Edmond de Sélys Longchamps (May 25, 1813 - December 11, 1900) was a Belgian politician and scientist. ... Genera See text. ... Genera Hypopetalia Phyllopetalia Austropetaliidae is a family of dragonflies. ... Genera Anotogaster Cordulegaster Epitheca Neallogaster Sonjagaster The Cordulegastridae are a family of Odonata (dragonflies) from the suborder Anisoptera. ... Genera include: Cordulia Dorocordulia Epitheca Helocordulia Idionyx Lintneri Neurocordulia Somatochlora Williamsonia The insect family Corduliidae contains the emerald dragonflies or green-eyed skimmers. ... Genera Antipodogomphus Austrogomphus Hemigomphus Ictinogomphus Odontogomphus Gomphidae is an Odonata family that contains about 90 genera and 900 species. ... Genera see text The skimmers or perchers and their relatives form the Libellulidae, the largest dragonfly family in the world. ... Genera include: Didymops Macromia Tauriphilia The insect family Macromiidae contains the dragonfly species known as cruisers or skimmers. ... Species Neopetalia punctata Neopetalia punctata is a dragonfly, the only member of the family Neopetaliidae. ... Genera See text The Petaltails of the family Petaluridae are apparently the most ancient of the extant dragonflies, having fossil members from as early as the Jurassic (over 150 million years ago). ...

A dragonfly is a type of insect belonging to the order Odonata, the suborder Epiprocta or, in the strict sense, the infraorder Anisoptera. It is characterized by large multifaceted eyes, two pairs of strong, transparent wings, and an elongated body. Orders Subclass Apterygota Archaeognatha (bristletails) Thysanura (silverfish) Subclass Pterygota Infraclass Paleoptera (Probably paraphyletic) Ephemeroptera (mayflies) Odonata (dragonflies and damselflies) Infraclass Neoptera Superorder Exopterygota Grylloblattodea (ice-crawlers) Mantophasmatodea (gladiators) Plecoptera (stoneflies) Embioptera (webspinners) Zoraptera (angel insects) Dermaptera (earwigs) Orthoptera (grasshoppers, etc) Phasmatodea (stick insects) Blattodea (cockroaches) Isoptera (termites) Mantodea (mantids) Psocoptera... Suborders Epiprocta (dragonflies), including infraorder Anisoptera (true dragonflies) Zygoptera (damselflies) Reference: ITIS 101593 as of 2002-07-26 Odonata is an order of insects, encompassing dragonflies (Anisoptera) and damselflies (Zygoptera). ... The Epiprocta (Bechly 1996) is one of the two suborders of the Odonata (the Order to which dragonflies and damselflies belong). ... Compound eye of a dragonfly A compound eye is a visual organ found in arthropods such as insects and crustaceans. ... Wing structure of a dragonfly (family Gomphidae) Insect wings are outgrowths of the insect exoskeleton that enable insects to fly. ...


Dragonflies typically eat mosquitoes, midges, and other small insects like flies, bees, and butterflies. They are therefore valued as predators, since they help control populations of harmful insects. Dragonflies are usually found around lakes, ponds, streams and wetlands because their larvae, known as "nymphs", are aquatic. Dragonflies do not normally bite or sting humans, though they will bite in order to escape, if grasped by the abdomen. For other uses, see Mosquito (disambiguation). ... For other uses, see Midge (disambiguation). ... For other uses, see Fly (disambiguation) and Flies (disambiguation). ... For other uses, see Western honey bee and Bee (disambiguation). ... Superfamilies and families Superfamily Hedyloidea: Hedylidae Superfamily Hesperioidea: Hesperiidae Superfamily Papilionoidea: Papilionidae Pieridae Nymphalidae Lycaenidae Riodinidae A butterfly is an insect of the order Lepidoptera. ... Predator and Prey redirect here. ... A subtropical wetland in Florida, USA, with an endangered American Crocodile. ... A larval insect A larva (Latin; plural larvae) is a juvenile form of animal with indirect development, undergoing metamorphosis (for example, insects or amphibians). ... Praying mantis nymphs, approximately 4mm long, clustered on a leaf In biology, a nymph is the immature form of some insect species, which undergoes incomplete metamorphosis (Hemimetabolism) before reaching its adult stage; unlike a larva, a nymphs overall form already resembles that of an adult. ... The abdomen in a human and an ant. ...

Contents

Dragonfly characteristics

Male Dragonflies are capable of hovering followed by rapid acceleration. Some nymphs even hunt on land,[1] an aptitude which could easily have been more common in ancient times when terrestrial predators were clumsier. Giant dragonflies can glide for 20 meters at 10 degrees and a speed of 74 cm per second which is similar to some birds.[2] They capture their prey by clasping them in legs studded with spikes. Prey can not escape by diving away because dragonflies always attack from below. .


Life Cycle

Dragonfly nymph
Dragonfly nymph

Female dragonflies lay eggs in or near water, often on floating or emergent plants. When laying eggs, some species will submerge themselves completely in order to lay their eggs on a suitable surface. Most of a dragonfly's life is spent in the larval, (naiad, that is, nymph) form, beneath the water's surface, using internal gills to breathe, and using extendable jaws to catch other invertebrates or even vertebrates such as tadpoles and fish. The larval stage of large dragonflies may last as long as five years. In smaller species, this stage may last between two months and three years. When the larva is ready to metamorphose into an adult, it climbs up a reed or other emergent plant at night. Exposure to air causes the larva to begin breathing. The skin splits at a weak spot behind the head and the adult dragonfly crawls out of its old larval skin, waits for the sun to rise, pumps up its wings, and flies off to feed on midges and flies. The adult stage of larger species of dragonfly can last as long as four months. Image File history File linksMetadata Download high resolution version (800x800, 192 KB) // ファイルの概要 シオカラトンボのヤゴ(トンボ,Odonata) 撮影場所 姫路市水族館 Source Page http://opencage. ... Image File history File linksMetadata Download high resolution version (800x800, 192 KB) // ファイルの概要 シオカラトンボのヤゴ(トンボ,Odonata) 撮影場所 姫路市水族館 Source Page http://opencage. ... Praying mantis nymphs, approximately 4mm long, clustered on a leaf In biology, a nymph is the immature form of some insect species, which undergoes incomplete metamorphosis (Hemimetabolism) before reaching its adult stage; unlike a larva, a nymphs overall form already resembles that of an adult. ... In most birds and reptiles, an egg (Latin ovum) is the zygote, resulting from fertilization of the ovum. ... ... A larval insect A larva (Latin; plural larvae) is a juvenile form of animal with indirect development, undergoing metamorphosis (for example, insects or amphibians). ... In biology, a nymph is the immature form of some insect species (e. ... For other uses, see Gill (disambiguation). ... Human jaw front view Human jaw left view Human jaw top view The jaw is either of the two opposable structures forming, or near the entrance to, the mouth. ... Invertebrate is an English word that describes any animal without a spinal column. ... This article does not cite any references or sources. ... For other uses, see Tadpole (disambiguation). ... For other uses, see Fish (disambiguation). ... METAMORPHOSE - Mask Sound & Dance Theatre is an original idea created by Reinhard Kreckel in 1987. ... species Pragmites australis Reed is a generic term used to describe numerous plants including: Common Reed (Phragmites australis Cav. ... For other uses, see Midge (disambiguation). ... Fly can refer to any of the following things: A fly (plural flies) is any species of insect of the order Diptera. ...


Classification

Ancient dragonflies ("Anisozygoptera")

Formerly, the Anisoptera were given suborder rank beside the "ancient dragonflies" (Anisozygoptera) which were believed to contain the two living species of the genus Epiophlebia and numerous fossil ones. More recently it turned out that the "anisozygopterans" form a paraphyletic assemblage of morphologically primitive relatives of the Anisoptera. Thus, the Anisoptera (true dragonflies) are reduced to an infraorder in the new suborder Epiprocta (dragonflies in general). The artificial grouping Anisozygoptera is disbanded, its members being largely recognized as extinct offshoots at various stages of dragonfly evolution. The two living species formerly placed there — the Asian relict dragonflies — form the infraorder Epiophlebioptera alongside the Anisoptera. In phylogenetics, a grouping of organisms is said to be paraphyletic (Greek para = near and phyle = race) if all the members of the group have a common ancestor, but the group does not include all the descendants of the most recent common ancestor of all group members. ... The term morphology in biology refers to the outward appearance (shape, structure, colour, pattern) of an organism or taxon and its component parts. ... Scientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. ... This article is about evolution in biology. ...

Wing structure of a dragonfly
Wing structure of a dragonfly

Image File history File linksMetadata Download high-resolution version (1922x1232, 683 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Dragonfly Insect wing Gomphidae Pterostigma Metadata This file contains additional information, probably added from the digital camera or... Image File history File linksMetadata Download high-resolution version (1922x1232, 683 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Dragonfly Insect wing Gomphidae Pterostigma Metadata This file contains additional information, probably added from the digital camera or...

Dragonflies or damselflies?

Damselflies (suborder Zygoptera) are often confused with dragonflies, but the two insects are distinct; most damselflies at rest hold their wings together above the body or held slightly open above (such as in the family Lestidae), whereas dragonflies at rest hold their wings horizontally or occasionally slightly down and forward. Also, the back wing of the dragonfly broadens near the base, caudal to the connecting point at the body, while the back wing of the damselfly is essentially similar to the front wing.The eyes on a damselfly are apart; in most dragonflies the eyes touch. Notable exceptions to this rule are the Petaluridae (Petaltails) and the Gomphidae (Clubtails). Both are members of the Odonata order, making their life cycles very similar. Families Amphipterygidae Calopterygidae - Demoiselles Chlorocyphidae - Jewels Coenagrionidae - Pond Damselflies Dicteriadidae - Barelegs Euphaeidae - Gossamerwings Hemiphlebidae - Reedlings Isosticidae - Narrow-wings Lestidae - Spreadwings Lestoididae Megapodagrionidae - Flatwings Perilestidae - Shortwings Platycnemidae - Brook Damselflies Platystictidae - Forest Damselflies Polythoridae - Bannerwings Protoneuridae - Pinflies Pseudostigmatidae - Forest Giants Synlestidae - Sylphs The Damselfly (Suborder Zygoptera) is an insect in the Order...


Some common species of the Northern Hemisphere

Broad-bodied Chaser
Broad-bodied Chaser

Image File history File links Metadata Size of this preview: 796 × 600 pixelsFull resolution (1504 × 1133 pixel, file size: 1. ... Image File history File links Metadata Size of this preview: 796 × 600 pixelsFull resolution (1504 × 1133 pixel, file size: 1. ... Binomial name Anax imperator Leach, 1815 The Emperor Dragonfly, Anax imperator, is a large and powerful species of European hawker dragonfly. ... Binomial name Orthetrum coerulescens (Fabricius, 1798) The Keeled Skimmer, Orthetrum coerulescens, is a European dragonfly. ... Binomial name Orthetrum cancellatum (Linnaeus, 1758) The Black-tailed Skimmer, Orthetrum cancellatum, is a European dragonfly. ... Binomial name Libellula lydia (Drury, 1770) The Common Whitetail or Long-tailed Skimmer, Libellula lydia is a common dragonfly across much of North America, with a striking and unusual appearance. ... Binomial name Aeshna mixta (Latreille, 1805) The Migrant Hawker (Aeshna mixta) is with its length of 63 mm one of the smaller species of hawker dragonflies. ... Binomial name Aeshna caerulea (Strom, 1783) The Azure Hawker (Aeshna caerulea) is one of the smaller species of hawker dragonflies, (family Aeshnidae). ... Binomial name (Muller, 1764) The Southern Hawker (Aeshna cyanea), known as the Blue Darner in the Western Hemisphere, is a 70 mm long species of hawker dragonfly. ... The Norfolk hawker Aeshna isosceles is an extremely rare dragonfly, one of two species of brown hawkers in Britain. ... Binomial name Aeshna juncea (Linnaeus, 1758) The Common Hawker (Aeshna juncea) is one of the larger species of hawker dragonflies. ... Binomial name Sympetrum fonscolombii Red-veined Darter is a dragonfly of the genus Sympetrum. ... Binomial name (Charpentier, 1840) The Common Darter (Sympetrum striolatum) is a dragonfly of the family Libellulidae native to Eurasia. ... Binomial name Sympetrum vulgatum (Linnaeus, 1758) The Vagrant Darter, Sympetrum vulgatum, is a European dragonfly. ... Binomial name Sympetrum flaveolum (Linnaeus, 1758) The Yellow-winged Darter, Sympetrum flaveolum, is a European dragonfly. ... Binomial name Libellula depressa (Linnaeus, 1758) The Broad-bodied Chaser, Libellula depressa, is a European dragonfly. ... Binomial name Libellula quadrimaculata (Linnaeus, 1758) The Four-spotted Chaser, Libellula quadrimaculata, is a European dragonfly. ... Binomial name Libellula fulva (Müller, 1764) The scarce chaser (Libellula fulva) is a species of dragonfly. ... Binomial name Anax junius (Drury, 1773) The Green Darner (Anax junius) is nicknamed Darning Needle because of its body shape. ... Binomial name Cordulia aenea (Linnaeus, 1758) The downy emerald (Cordulia aenea) is a species of dragonfly. ... Binomial name Aeshna multicolor Hagen, 1861 The Blue-eyed Darner (Aeshna multicolor, syn. ... Binomial name Orthemis ferruginea (Fab, 1775)) The Roseate Skimmer is a common southern dragonfly. ... Binomial name Anax junius (Burmeister, 1839) The Widow Skimmer is is one of the group of dragonflies known as King Skimmers. ... Binomial name Celithemis fasciata Kirby, 1889 The Banded Pennant, Celithemis fasciata, is a dragonfly found in North American, in the Pennant genus of dragonflies. ...

Some common species of the Southern Hemisphere

A Tau Emerald in mid flight
A Tau Emerald in mid flight
Kirby's Dropwing (Trithemis kirbyi) in Tsumeb, Namibia.
Kirby's Dropwing (Trithemis kirbyi) in Tsumeb, Namibia.

Image File history File links Metadata Size of this preview: 799 × 599 pixelsFull resolution (2821 × 2116 pixel, file size: 1. ... Image File history File links Metadata Size of this preview: 799 × 599 pixelsFull resolution (2821 × 2116 pixel, file size: 1. ... Tsumeb open cast pit, buildings and railway about 1931 Tsumeb is the capital city of the Oshikoto region in northern Namibia. ... Acisoma is a genus of dragonfly in family Libellulidae. ... Binomial name Orthetrum cancellatum (Linnaeus, 1758) The Black-tailed Skimmer, Orthetrum cancellatum, is a European dragonfly. ...

Dragonflies in culture

In Europe, dragonflies have often been seen as sinister. Some English vernacular names, such as "devil's needle" and "ear cutter", link them with evil or injury.[3] A Romanian folk tale says that the dragonfly was once a horse possessed by the devil. This is also seen in the Maltese culture as the word for dragonfly which is "Debba ta' l-infern" literally means Hell's mare. Swedish folklore holds that the devil uses dragonflies to weigh people's souls.[4] Another Swedish legend holds that trolls use the dragonflies as spindles when weaving their clothes (hence the Swedish word for dragonfly trollslända, lit. "troll's spindle") as well as sending them to poke out the eyes of their enemies.[citation needed] The Norwegian name for dragonflies is "Øyenstikker", which literally means Eye Poker. They are often associated with snakes, as in the Welsh name gwas-y-neidr, "adder's servant".[3] The Southern United States term "snake doctor" refers to a folk belief that dragonflies follow snakes around and stitch them back together if they are injured.[5] The Lithuanian word "Laumžirgis" is a composite word meaning "the Lauma's horse", while in Dutch, Aeshna mixta is called "Paardenbijter" or "horse biter". In some South American countries, dragonflies are also called matacaballo (horse killer), or caballito del diablo (devil's horse), since they were perceived as harmful, some species being quite large for an insect. This is an overview of the Devil. ... This article does not cite any references or sources. ... Binomial name Equus caballus Linnaeus, 1758 The horse (Equus caballus, sometimes seen as a subspecies of the Wild Horse, Equus ferus caballus) is a large odd-toed ungulate mammal, one of ten modern species of the genus Equus. ... For other uses, see Troll (disambiguation). ... A spindle (sometimes called a drop spindle) is a wooden spike weighted at one end with a wheel and an optional hook at the other end. ... For other uses, see Snake (disambiguation). ... Welsh redirects here, and this article describes the Welsh language. ... Adder is the name of several snakes, most belonging to the viper family, especially the Viperinae subfamily (pitless vipers). ... Historic Southern United States. ... Lauma, in Baltic mythology, is a woodland faery, and guardian spirit of orphans. ...


In East Asia and among Native Americans, dragonflies have a far better reputation, one that can also be said to have positively influenced modern day views about dragonflies in most countries.


For some Native American tribes they represent swiftness and activity, and for the Navajo they symbolize pure water. Dragonflies are a common motif in Zuni pottery; stylized as a double-barred cross, they appear in Hopi rock art and on Pueblo necklaces.[6] It is said in some Native American beliefs that dragonflies are a symbol of renewal after a time of great hardship. The Navajo people (or Diné) of the Southwestern United States are currently the largest Native American tribe in North America, with an estimated tribal population of 300,000. ... The Zuni (also spelled Zuñi) or Ashiwi are a Native American tribe, one of the Pueblo peoples, most of whom live in the Pueblo of Zuñi on the Zuni River, a tributary of the Little Colorado River, in western New Mexico. ... Moki redirects here. ... It has been suggested that Pueblo be merged into this article or section. ...


In Japan dragonflies are symbols of courage, strength, and happiness, and they often appear in art and literature, especially haiku. In ancient mythology, Japan was known as Akitsushima, which means "Land of the Dragonflies". The love for dragonflies is reflected by the fact that there are traditional names for almost all of the 200 species of dragonflies found in and around Japan.[7] Japanese children catch large dragonflies as a game, using a hair with a small pebble tied to each end, which they throw into the air. The dragonfly mistakes the pebbles for prey, gets tangled in the hair, and is dragged to the ground by the weight.[8] For the operating system, see Haiku (operating system). ...


Also, in Japan, amongst the Three Great Spears of Japan is one which is called the Tonbo-giri, which when translated is called 'The Dragon Fly Cutter'. The spear is an important part of Japans imperial regalia, the spear it's self was once wielded by the legendary Samurai, Honda Tadakatsu. It's name is derived from the story that the blade is so sharp, that once a dragon fly landed on it and was instantly cut in half. For other uses, see Samurai (disambiguation). ... Honda Tadakatsu ) (1548 – December 3, 1610), also called Honda Heihachirō (本多平八郎), was a Japanese general (and later a daimyo) of the late Sengoku through early Edo period, who served Tokugawa Ieyasu. ...


They also have traditional uses as medicine in Japan and China. In some parts of the world they are a food source, eaten either as adults or larvae; in Indonesia, for example, they are caught on poles made sticky with birdlime, then fried in oil as a delicacy.[3] Birdlime is a viscid, adhesive substance used in trapping birds. ... This is a List of delicacies. ...


Vietnamese people have a traditional way to forecast rain by seeing dragonflies: "Chuồn chuồn bay thấp thì mưa, bay cao thì nắng, bay vừa thì râm" (Dragonflies fly at low level, it is rainy; dragonflies fly at high level, it is sunny; dragonflies fly at medium level, it is shadowy). This article is about precipitation. ...


Images of dragonflies were common in Art Nouveau, especially in jewelry designs.[9] They have also been used as a decorative motif on fabrics and home furnishings.[10] Vitebsk Railway Station one of the finest examples of Art Nouveau architecture. ...


Gallery

See also

Elliot Charles Gordon Pinhey 18 July 1910 Knokke, Brugge - 8 May 2000, was an entomologist who worked in Africa and specialised in African Lepidoptera and Odonata. ... Sympetrum vulgatum in the obelisk posture. ...

References

  1. ^ Grzimeck, HC; Bernard (1975). Grzimek's Animal Life Encyclopedia Vol 22. Detroit: Visible Ink Press, 348. 
  2. ^ Ruppell G 1989 Kinematic analysis of symmetrical flight maneuvers of Odonata J. Exp. Biol. 144; 13-42.
  3. ^ a b c Corbet, Phillip S. (1999). Dragonflies: Behavior and Ecology of Odonata. Ithaca, NY: Cornell University Press, 559-561. ISBN 0-8014-2592-1. 
  4. ^ Mitchell, Forrest L.; James L. Lasswell (2005). A Dazzle of Dragonflies. College Station, TX: Texas A&M University Press, 25-27. ISBN 1-585-44459-6. 
  5. ^ Hand, Wayland D. (1973). "From Idea to Word: Folk Beliefs and Customs Underlying Folk Speech". American Speech 48 (1/2): 67-76. Retrieved on 2007-02-15. 
  6. ^ Mitchell and Lasswell, 20-26.
  7. ^ Waldbauer, Gilbert (1998). The Handy Bug Answer Book. Detroit: Visible Ink Press, 91. ISBN 1-57859-049-3. 
  8. ^ Mitchell and Lasswell, 38.
  9. ^ Moonan, Wendy. "Dragonflies Shimmering as Jewelry", New York Times, August 13, 1999, pp. E2:38. 
  10. ^ Large, Elizabeth. "THE LATEST BUZZ; In the world of design, dragonflies are flying high", The Sun (Baltimore, MD), June 27, 1999, pp. 6N. 

Year 2007 (MMVII) was a common year starting on Monday of the Gregorian calendar in the 21st century. ... is the 46th day of the year in the Gregorian calendar. ... is the 225th day of the year (226th in leap years) in the Gregorian calendar. ... Events of 2008: (EMILY) Me Lesley and MIley are going to China! This article is about the year. ... is the 178th day of the year (179th in leap years) in the Gregorian calendar. ... Events of 2008: (EMILY) Me Lesley and MIley are going to China! This article is about the year. ...

External links

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  Results from FactBites:
 
Dragonfly - Wikipedia, the free encyclopedia (649 words)
Dragonflies do not bite or sting humans; in fact, they are valued as a predator that helps control the populations of harmful insects, such as mosquitoes.
Dragonflies are the world's fastest insects, capable of reaching speeds of up to 97 km/h (60 mph).
Dragonflies have up to 30,000 facets to their compound eyes; each one is a separate light-sensing organ or ommatidium, arranged to give nearly a 360° field of vision.
DragonFly BSD - Wikipedia, the free encyclopedia (2759 words)
Dillon started DragonFly in the belief that the methods and techniques being adopted for threading and SMP in FreeBSD 5 would lead to a poorly performing system that would be very difficult to maintain.
DragonFly forked from FreeBSD 4.8 and imports features and bug fixes from FreeBSD 4 and 5 where appropriate, such as ACPI and a new ATA driver framework from FreeBSD 4.
DragonFly BSD 1.0, released 12 July 2004, was meant to be a "technology showcase" rather than an integrated production release.
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