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Black Saddlebags
The black saddlebags (''Tramea lacerata'') is a species of skimmer dragonfly found throughout North America. It has distinctive wings with characteristic black blotches at their proximal ends, which make the dragonfly look as though it is wearing saddlebags. The black saddlebags is a relatively large dragonfly at about in length. The body is thin and black, and the female may have lighter spotting or mottling dorsally. The head is much wider than the rest of the body and is dark brown in color. The insect can be found at bodies of stagnant water, such as ponds and ditches. Reproduction Like all dragonflies, ''Tramea lacerata'' pairs mate in the "wheel" position. The female mates once and stores all the sperm she needs for fertilization. If she should mate again, the second male will remove the sperm of the first male from her body with the brush-like apparatus on his specially-adapted penis. During egg laying, the male releases the female so she can drop down to the water to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hagen
Hagen () is a city in the States of Germany, state of North Rhine-Westphalia, in western Germany, on the southeastern edge of the Ruhr area, 15 km south of Dortmund, where the rivers Lenne and Volme meet the Ruhr (river), Ruhr. In 2023, the population was 197,677. The city is home to the FernUniversität Hagen (University of Hagen), the only state-funded distance education university in Germany. Geography The largest extension of Hagen's municipal area is 17.1 km in a north-south direction and 15.5 km in a west-east direction. The city boundary of 89.7 km is made up of 3.3 km to Dortmund, 9 km to the Unna (district), district of Unna, 56.6 km to the Ennepe-Ruhr-Kreis, Ennepe-Ruhr district and 20.8 km to the Märkischer Kreis, Märkisch district. The area of the city (160.36 km²) is roughly the size of the Liechtenstein, Principality of Liechtenstein. 42 per cent of Hagen's municipal area consists of forest. The four rivers in Hagen stretch over a length of 52.2 km: Ruhr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Libellulidae
The chasers, darters, skimmers, and perchers and their relatives form the Libellulidae, the largest family of dragonflies. It is sometimes considered to contain the Corduliidae as the subfamily Corduliinae and the Macromiidae as the subfamily Macromiinae. Even if these are excluded (as Silsby does), there remains a family of over 1000 species. With nearly worldwide distribution, these are the most commonly encountered dragonflies. The genus '' Libellula'' is mostly New World but also has one of the few endangered odonates from Japan: '' Libellula angelina''. Many of the members of this genus are brightly colored or have banded wings. The related genus '' Plathemis'' includes the whitetails. The genus '' Celithemis'' contains several brightly marked species in the southern United States. Members of the genus '' Sympetrum'' are called darters (or meadowhawks in North America) and are found throughout most of the world, except Australia. Several tropical species in the genera '' Tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saddlebag
Saddlebags are bags that are attached to saddles. Horse riding In horse riding, saddlebags sit in various positions, on the back, side, or front of the saddle. Most attach to the saddle by straps and ties. They can be made from various materials. Although leather was the traditional material, it is heavier and requires more maintenance than many modern versions. There are several types: Pommel bags (which sit in front of the saddle), traditional paired saddlebags (which lie on the hips of the horse, on either side of the cantle), and assorted smaller bags such as a cantle bag (a small tube-like bag that sits just behind the saddle), or a single small saddle bag that may be carried on the off-side (right hand side) of an English saddle. Pack animal Pannier-style bags are sometimes fitted over a pack saddle used for packhorse, packing gear on a horse or other pack animal (often, a mule or donkey) rather than for carrying a rider. In Turkish Anatolia, Iran and Baluchistan, sad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dragonfly
A dragonfly is a flying insect belonging to the infraorder Anisoptera below the order Odonata. About 3,000 extant species of dragonflies are known. Most are tropical, with fewer species in temperate regions. Loss of wetland habitat threatens dragonfly populations around the world. Adult dragonflies are characterised by a pair of large, multifaceted, compound eyes, two pairs of strong, transparent wings, sometimes with coloured patches, and an elongated body. Many dragonflies have brilliant iridescent or metallic colours produced by structural coloration, making them conspicuous in flight. An adult dragonfly's compound eyes have nearly 24,000 ommatidia each. Dragonflies can be mistaken for the closely related damselflies, which make up the other odonatan infraorder ( Zygoptera) and are similar in body plan, though usually lighter in build; however, the wings of most dragonflies are held flat and away from the body, while damselflies hold their wings folded at rest, al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Penis
A penis (; : penises or penes) is a sex organ through which male and hermaphrodite animals expel semen during copulation (zoology), copulation, and through which male placental mammals and marsupials also Urination, urinate. The term ''penis'' applies to many intromittent organs of vertebrates and invertebrates, but not to all. As an example, the intromittent organ of most Cephalopoda is the hectocotylus, a specialized arm, and male spiders use their pedipalps. Even within the Vertebrata, there are morphological variants with specific terminology, such as Hemipenis, hemipenes. Etymology The word "penis" is taken from the Latin word for "Latin profanity#Synonyms and metaphors, tail". Some derive that from Proto-Indo-European language, Indo-European ''*pesnis'', and the Greek word πέος = "penis" from Indo-European ''*pesos''. Prior to the adoption of the Latin word in English, the penis was referred to as a "yard". The Oxford English Dictionary cites an example of the w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Larva
A larva (; : larvae ) is a distinct juvenile form many animals undergo before metamorphosis into their next life stage. Animals with indirect development such as insects, some arachnids, amphibians, or cnidarians typically have a larval phase of their life cycle. A larva's appearance is generally very different from the adult form (''e.g.'' caterpillars and butterflies) including different unique structures and organs that do not occur in the adult form. Their diet may also be considerably different. In the case of smaller primitive arachnids, the larval stage differs by having three instead of four pairs of legs. Larvae are frequently adapted to different environments than adults. For example, some larvae such as tadpoles live almost exclusively in aquatic environments but can live outside water as adult frogs. By living in a distinct environment, larvae may be given shelter from predators and reduce competition for resources with the adult population. Animals in the lar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mosquitoes
Mosquitoes, the Culicidae, are a family of small flies consisting of 3,600 species. The word ''mosquito'' (formed by '' mosca'' and diminutive ''-ito'') is Spanish and Portuguese for ''little fly''. Mosquitoes have a slender segmented body, one pair of wings, three pairs of long hair-like legs, and specialized, highly elongated, piercing-sucking mouthparts. All mosquitoes drink nectar from flowers; females of some species have in addition adapted to drink blood. The group diversified during the Cretaceous period. Evolutionary biologists view mosquitoes as micropredators, small animals that parasitise larger ones by drinking their blood without immediately killing them. Medical parasitologists view mosquitoes instead as vectors of disease, carrying protozoan parasites or bacterial or viral pathogens from one host to another. The mosquito life cycle consists of four stages: egg, larva, pupa, and adult. Eggs are laid on the water surface; they hatch into motile larv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
