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Topic: Jumping spider

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Spider (animal)

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Jewel Spider

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	HOW DO JUMPING SPIDERS CATCH UP ON THEIR PREY?: A MODEL FOR PURSUIT BEHAVIOUR. (ARANEAE; SALTICIDAE)
		Jumping spiders have good eyesight (Homann 1928, Land 1969 a b), making use of six of their eight eyes to turn towards, catch up on and jump at their prey.
		Studies using jumping spiders able to move freely and in which different pairs of eyes were occluded (Forster 1979) showed that chasing behavior is controlled by the anterior-lateral eyes if the target is moving at angular velocities of more than 4°/sec.
		Spiders were stabilized in the laboratory for at least three weeks at nightly temperatures of 10°C to 12°C and daily temperatures of 16°C to 20°C, concurrently being exposed to normal circadian levels of illumination.
	philosophy.wisc.edu /forster/Spider/Default.htm (3464 words)

	Vietnamese spiders
		Jumping spiders often have metallic green or other coloring on their fangs, but the metallic stripes on this little fellow near the shore north of Nha Trang were just amazing.
		Unlike the jumping spiders and lynx spiders, this one was hunting at night on a tree trunk, and I suspect that its flat shape is an adaptation to allow it to hide under the tree's bark during the daytime.
		Some spiders use their cerci to draw out and manipulate the silk which is extruded from the spinnerets on their belly (some silk is clearly visible coming out of the spinneret of the spider in the previous photo).
	www.richard-seaman.com /Insects/Vietnam/Spiders/Highlights/index.html (2365 words)

	BugInfo.com \| Information on All Your Household Bugs and Pests
		The jumping spider has eyesight so well developed that it is one of the few spiders that detects objects without the need for movement by that object.
		Jumping spiders actually are fairly aggressive animals, not only in defense when they sense danger nearby, but also toward other jumping spiders.
		This is one of the prettiest jumping spiders, with that fl and white contrasting coloring, and the males are blessed with beautiful shimmering, metallic green chelicerae, which are the coverings over their fangs.
	www.buginfo.com /articles/jumpingspiders.cfm (1528 words)

	Jumping Spiders by Jim Cornish, Gander, Newfoundland Canada
		Although jumping spiders are rather small (3—10 mm), they are among the most beautiful and delightful of all arthropods.
		Jumping spiders (Salticidae) are easily distinguished from other spiders by their four big eyes on the face and four smaller eyes on top of the head.
		Jumping Spiders are common in North America and in Idaho.
	www.cdli.ca /CITE/spidersjumping.htm (332 words)

	Olympus MIC-D: Reflected Light Gallery - Jumping Spider (Phidippus species)
		The eyes of a jumping spider are arranged with four on top of the head, or cephalothorax, and four in front.
		It is interesting to note that the proportion of brain-to-body devoted by a jumping spider to visual tasks is similar to a human's.
		These arachnids are commonly called jumping spiders because they are capable of jumping 25 times their body length, and as predators, accurately pounce on their prey instead of spinning webs for entrapment.
	www.olympusmicro.com /micd/galleries/reflected/spider2.html (611 words)

	Hobo Spider Web Site: Jumping Spiders as Competitors/Predators
		Jumping spiders will watch and follow a finger waved before them, and appear to contemplate each move; their eight eyes are designed for predation, two of the eight being large, giving them vision far superior to most other invertebrates.
		Jumping spiders typically pursue and leap upon their prey, and can jump considerable distances in the process; they are capable of moving sideways or backward with great agility.
		Jumping spiders are primarily diurnal, but due to the prevalence of certain species around buildings and yards, they do come into contact with, and prey upon hobo spiders.
	www.srv.net /~dkv/hobospider/jumpings.html (922 words)

	Spiders - How spiders see the world
		Spider eye lenses are better than photographic lenses in terms of their image brightness (very low F-numbers).
		However, because most spider eye retinas have relatively coarse-grained mosaics of receptor cells, their resolution of these images is much poorer than in the human eye.
		Jumping spiders can leap more than 20 times their own body length, propelled by their back legs.
	www.amonline.net.au /spiders/toolkit/hairy/see.htm (744 words)

	NATURE. True Adventures of the Ultimate Spider-Hunter. Spider Vision \| PBS
		Spiders that actively hunt and stalk their prey, such as jumping spiders, have excellent vision.
		Jumping spiders, featured in SPIDER-HUNTER, are known for their ability to leap 10 or even 30 times their own length.
		Then, as the spider moves in for the kill, it uses its other pair of eyes on either side of the large telescopic pair to measure just how far it needs to jump.
	www.pbs.org /wnet/nature/spiderhunter/vision.html (645 words)

	MICROSCOPY UK - MICSCAPE ARTICLE: Jumping spiders
		A jumping spider is one of the most fascinating of all spiders, although there isn't an arachnid anywhere that is not a complex and wondrous creature— the aversion most humans feel for these eight-legged predators.
		Depending upon the species, the face of an ornate tropical jumping spider may be metallic green or iridescent blue, decorated with brilliant red or orange scales and tufts of hair, and its short leg-like palps are clothed with snow-white hair.
		I have watched jumping spiders at work in many parts of the world and find them astonishing creatures— then, every species of animal is wondrous when left to its own devices and seen in its natural surroundings.
	www.microscopy-uk.org.uk /mag/art97b/baspider.html (1480 words)

	Jumping Spiders of Kentucky - University of Kentucky Entomology
		Jumping Spiders of Kentucky - University of Kentucky Entomology
		Jumping spiders are among the fastest creatures in the arthropod world.
		Jumping spiders in the Phidippus genus are some of the largest in the family.
	www.uky.edu /Ag/CritterFiles/casefile/spiders/jumping/jumping.htm (1165 words)

	Jumping spider - Wikipedia, the free encyclopedia
		Jumping spiders also use their silk to weave small tent-like dwellings, where females can protect their eggs and to serve as a shelter while moulting.
		Most other spiders will only eat prey that they have captured live because they are unable to see dead prey (some long-legged sac spiders and anyphaenid sac spiders are exceptions as they recognize insect eggs as food) but jumping spiders will eat flies that have been killed for them.
		Bimodal breathing in jumping spiders: morphometric partitioning of the lungs and tracheae in Salticus scenicus (Arachnida, Araneae, Salticidae).
	en.wikipedia.org /wiki/Jumping_spider (1218 words)

	Evidences of Creation.com
		Jumping spiders' imitations of ants are so perfect that other jumping spiders mistake them for real ants and try to hunt them.
		Jumping spiders are very successful hunters, to the point of even catching praying mantises, known as the most savage creatures in the insect world.
		When the spider catches its prey, or if it is in danger of attack, he splits the "nose" and unfolds the haves into jaws with unsheathed fangs at each tip.
	www.evidencesofcreation.com /spider04.htm (2166 words)

	CPCS: Spider Bites
		Spiders are defined as having eight jointed legs, no wings, no antennae and only two body sections: the thorax and the abdomen.
		Spiders generally prefer to live in undisturbed areas such as corners of the house or the eaves or in the garden where they can catch insects in peace.
		Spider bites by this spider are becoming recognized more often in California, which may be due to the fact that the spider is becoming better known.
	www.calpoison.org /public/spiders.html (2245 words)

	Jumping spiders Salticidae
		The female spider is easily recognized by the white stripe of hairs around the front of the abdomen.
		This spider is, with it size of 11 mm, one of the largest jumping spiders.
		The male spider is remarkably beautiful with its red painted third leg pair that he uses to attract female spiders.
	www.xs4all.nl /~ednieuw/Spiders/Salticidae/Salticidae.htm (1384 words)

	regal jumping spider - Phidippus regius C.L. Koch
		regal jumping spider - Phidippus regius C.L. Koch
		Jumping spiders can be recognized easily by their eye arrangement.
		The first impression made upon the casual observer is of a moderately large, fl, hairy spider; to the uninformed, this impression leads naturally to the conviction that the spider is a fl widow.
	creatures.ifas.ufl.edu /misc/regal_jumping_spider.htm (1194 words)

	Spider Identification and Management from Montana State University Extension Service
		Spider families are easily identified by the position and number of eyes, the overall shape, length of legs and form of the spinnerets.
		Brown recluse spiders are easily recognized by a combination of two characteristics: a dark fiddle or violin-shaped marking on the top side of the tan cephalothorax, and six eyes arranged in three pairs forming a semicircle.
		Spiders are beneficial, preying on insects, so control measures should only be used in situations where they become intolerablefor instance, where fl widow or other spiders pose a threat to individuals or pets.
	www.montana.edu /wwwpb/pubs/mt9210.html (2678 words)

	Jumping Spider
		Spiders differ from insect in that they have eight legs rather than six.
		This small tropical jumping spider is a proficient day hunter that does not rely on webs to catch its prey.
		Spiders are extremely important in keeping insect populations under control.
	www.insects.org /entophiles/arthropoda/arth_002.html (113 words)

	JUST THE FACTS - SHEET (Site not responding. Last check: 2007-10-04)
		Jumping spiders (Salticidae) are among the most attractive of spiders.
		Before jumping, the spider secures a silk thread on which it can climb back on in case it misses it target.
		Jumping spiders have eyes that are among the best in invertebrate animals.
	extension.ag.uidaho.edu /district4/MG/jpspider.html (403 words)

	spider
		It is Portia, a member of the Salticidae or jumping spider family, a creature that for 10 years has been the focus of research by R. Stimson Wilcox, a Binghamton biology professor, and his collaborator, New Zealand biologist Robert Jackson.
		Several species of jumping spiders are indigenous to the Southern Tier, he added.
		When the spider moves, the web vibrates the pointer, triggering an electrical signal that is recorded on tape, eventually to be digitized for computer analysis.
	inside.binghamton.edu /September-October/23Oct97/spider.html (1346 words)

	Jumping Spider
		The jumping spiders comprise the largest family of spiders with about 4000 species having been described.
		This type of spider stalk their prey by creeping ever closer until they are a few centimeters away, then they jump, grabbing their prey with their fore-legs.
		This type of spider can jump from a standing start, unlike most others which need a run, and they can also jump backwards and sideways with equal dexterity to avoid capture.
	www.the-piedpiper.co.uk /th11f(3).htm (206 words)

	Salticidae (jumping spiders)
		These spiders are harmless to man although there have been complaints where this comical, engaging animal has been accused of nasty bites.
		The legs are not especially muscled for jumping but instead a jump is propelled by an explosive release of hydraulic pressure in the 4 hind legs.
		The courting male jumping spider must dance before his mistress and it seems that the male makes desperate attempts to impress the female with his dancing repertoire while the female follows every step with critical interest.
	www.museums.org.za /bio/spiderweb/salticid.htm (529 words)

	Jumping spiders
		The jumping spiders are the personalities of the spider world.
		Many are daylight hunters, using their excellent vision to track, stalk and calculate distance, before suddenly leaping on their prey, propelled by their strong back legs.
		Its members could justifiably be called peacock spiders, both for the bright colours of the males and the way that they display them.
	www.amonline.net.au /factsheets/jumping_spider.htm (281 words)

	Spider-Man vs. True Spider Superpowers (Site not responding. Last check: 2007-10-04)
		Many species of jumping spider, found all over the world, can bound as much as 50 times their body length.
		They calculated that the grip of the jumping spider is so strong that it could hold 170 times the spider's own body weight before coming unstuck.
		The unusual thing, Martin said, is that the spider's clinging ability resembles that of a gecko more than that of an insect—even though eight-legged spiders are much more closely related to six-legged insects than to lizards.
	news.nationalgeographic.com /news/2004/06/0623_040623_tvspiders.html (611 words)

	Ladywildlife's Jumping Spider Page
		The jumping spider is found throughout the northern hemisphere.
		Although solitary by nature, the jumping spider is curious and does not appear to be timid.
		Of all spiders, the Salticidae family has the most acute vision; it is sensitive to color and polarized light.
	ladywildlife.com /animal/jumpingspider.html (747 words)

	SpiderRoom.info
		The Daring Jumping Spider can be found in the United States from the Atlantic Coast to the Rocky Mountains.
		Look for this spider in Virginia woods, grassy areas, and in gardens around fallen leaves and tree limbs, stones, and flowers.
		Its ability to jump great distances is a good defense as well as offense because it can readily escape danger by jumping quickly away.
	www.spiderroom.info /va_jumpingspider.html (263 words)

	Jumping Spiders: Interesting Thing of the Day
		All spiders have four pairs of eyes, but in jumping spiders, one of the pairs (the anterior median, or front and center pair) is unusually large.
		The spiders’ eyes are also sensitive to color, which is significant because some of the species also have very striking coloring—with the males typically being more colorful than the females.
		Some jumping spiders have elaborate mating rituals, in which the male performs an impressive and often very silly-looking dance in order to attract a female’s attention; the colored markings on the male’s body apparently figure into the female’s evaluation of the performance.
	itotd.com /articles/504/jumping-spiders (871 words)

	Garden Jumping Spider - Opisthoncus sp.
		This jumping spider is common in Brisbane gardens and backyards.
		The spider is brown in colour with white pattern on its abdomen and thorax.
		Jumping Spider hunts by jumping onto its prey, usually from a higher leaf to a lower leaf.
	www.geocities.com /brisbane_spiders/GardenJumpingSpider.htm (185 words)

	Jumping spider in a grassy field on the UMass campus
		Phidippus clarus is a jumping spider with excellent vision that captures prey by leaping upon it.
		The Jakob lab has been studying a number of aspects of jumping spider behavior, including spatial learning.
		Spiders colonize these tubes and construct silken nests within them, to which they return at the end of the foraging day.
	www.umass.edu /neuro/gallery/11.htm (104 words)

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