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Spiders

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Identifying spiders can often be difficult, as they are very small, elusive, and many species resemble one another. The colouration and pattern of a spider can be a useful way to identify them, as well as other key features such as the structure of their webs. In some cases, it is necessary to take a closer look at the genitalia under a microscope, as this can be the only way to confidently identify certain species. You can also use your location as a clue, as some species are more likely to be found in certain parts of the UK. Spiders have been the focus of stories and mythologies of various cultures for centuries. [132] Uttu, the ancient Sumerian goddess of weaving, was envisioned as a spider spinning her web. [133] [134] According to her main myth, she resisted her father Enki's sexual advances by ensconcing herself in her web, [134] but let him in after he promised her fresh produce as a marriage gift, [134] thereby allowing him to intoxicate her with beer and rape her. [134] Enki's wife Ninhursag heard Uttu's screams and rescued her, [134] removing Enki's semen from her vagina and planting it in the ground to produce eight previously-nonexistent plants. [134] Penney, D. & Selden, P.A. Deltshev, C. & Stoev, P. (eds.). "European Arachnology 2005" (PDF). Acta Zoologica Bulgarica. Supplement No. 1: 25–39. Assembling the Tree of Life– Phylogeny of Spiders: a review of the strictly fossil spider families The hubs of orb webs, where the spiders lurk, are usually above the center, as the spiders can move downwards faster than upwards. If there is an obvious direction in which the spider can retreat to avoid its own predators, the hub is usually offset towards that direction. [75]

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Despite the changes in Nefertiti's environment, the result of the experiment was that it was indeed able to adjust its feeding behavior to account for the effects of "zero-g" and still catch its prey. The primitive Liphistiidae, the "trapdoor spiders" of the family Ctenizidae and many tarantulas are ambush predators that lurk in burrows, often closed by trapdoors and often surrounded by networks of silk threads that alert these spiders to the presence of prey. [17] Other ambush predators do without such aids, including many crab spiders, [13] and a few species that prey on bees, which see ultraviolet, can adjust their ultraviolet reflectance to match the flowers in which they are lurking. [52] Wolf spiders, jumping spiders, fishing spiders and some crab spiders capture prey by chasing it, and rely mainly on vision to locate prey. [13] Portia uses both webs and cunning, versatile tactics to overcome prey. [62]Foelix, Rainer F. (2011). Biology of Spiders (3rd p/bed.). Oxford University Press. pp. 100–01. ISBN 978-0-19-973482-5. charts.org.nz > Space - Neighbourhood (song)". Hung Medien. Archived from the original on 3 October 2015 . Retrieved 3 October 2015. This well-illustrated guide includes all of the 34 families known to occur in Britain. Two identification keys are presented. The first uses morphological characters that are visible under low-power magnification; the second key, a tabular guide, includes a range of behavioural and ecological characters. Sections on spider morphology, biology, ecology and a glossary are also provided.

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Foelix, Rainer F. (1996). Biology of Spiders. New York: Oxford University Press. p. 3. ISBN 978-0-19-509593-7.a b c d e f g h Oxford, G.S.; Gillespie, R.G. (1998). "Evolution and Ecology of Spider Coloration". Annual Review of Entomology. 43: 619–43. doi: 10.1146/annurev.ento.43.1.619. PMID 15012400. S2CID 6963733. Schütt, K. (1995). " Drapetisca socialis (Araneae: Linyphiidae): Web reduction– ethological and morphological adaptations" (PDF). European Journal of Entomology. 92: 553–63. Spiders was released by Gut Records in the United Kingdom on 16 September 1996. [5] In the United States, it was released by Gut and Universal Records on 14 January 1997. [30] Scott chose to adorn the album artwork with numerous tarantulas, which also gives the album its title; he explained "some people can't even put the CD on the [player]. They have to get their friends to put on the CD for them. The reason we put it on the LP cover is simply just to test our fans, because we know there's loads of people who are terrified by spiders, and if they really love us that much, they'll still go out and buy it." [22]

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What to look for: This species can be confused with many other UK species. Their body is dark brown, with variable patterns on their abdomen. Usually cream and dark brown marks that can sometimes resemble a skull. There are several unusual variants of orb web, many of them convergently evolved, including: attachment of lines to the surface of water, possibly to trap insects in or on the surface; webs with twigs through their centers, possibly to hide the spiders from predators; "ladderlike" webs that appear most effective in catching moths. However, the significance of many variations is unclear. [75] The orb-weaving species, Zygiella x-notata, for example, is known for its characteristic missing sector orb web. The missing sector contains a signal thread used to detect prey vibrations on the female's web. [79] A specimen of the spider species Trichonephila clavipes on board the international space station ISS. Credit: BioServe Space Technologies, University of Colorado Boulder The reserve spider escaped

In addition to accounting for over 90% of spider species, the Araneomorphae, also known as the "true spiders", include orb-web spiders, the cursorial wolf spiders, and jumping spiders, [97] as well as the only known herbivorous spider, Bagheera kiplingi. [55] They are distinguished by having fangs that oppose each other and cross in a pinching action, in contrast to the Mygalomorphae, which have fangs that are nearly parallel in alignment. [109] Human interaction Media coverage and misconceptions Cushing, P.E. (2008). "Spiders (Arachnida: Araneae)". In Capinera, J.L. (ed.). Encyclopedia of Entomology. Springer. p.3496. doi: 10.1007/978-1-4020-6359-6_4320. ISBN 978-1-4020-6242-1.

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