Why dont spiders stick to their own webs?
104208
I'm pretty sure on a web only some of the web is sticky. The spider just knows where to put its feet. I think... Or maybe its just the opposite of how a fly lands unside down on the ceiling.
829521
Many different types of tree-leaf feeding caterpillars do this; there are at least two reasons. As forex says - if a predator, like a spider, approaches, some species drop on a line of silk to avoid getting eaten. At other times and with other types of caterpillars, they dangle on a line because they're ready to turn into moths. They need a safer place to make a cocoon and pupate so they dangle until it feels right and then, hopefully, the wind will blow them into a lower, warmer and safer place to spend the winter in their cocoon. In the spring, they turn into moths and lay eggs on the leaves of the same type of tree that they grew up on. They’re usually small moths that nobody ever sees - unless they look. They spin silk from modified salivary glands which secrete a strong, elastic thread through spinnerets right next to their mouths; it’s similar to spider silk but their own recipe.
475647
This question is a bit misleading... only SOME species of spider die soon after laying their eggs. Many will live on for years and can reproduce several times.\n\nAs to those few which do die; reproduction is a very costly endeavor for any organism and this could diminish the spider's resources. Evolutionarily speaking, the only goal it to get one's genetic material to the next generation, that done, the organism is simply taking up habitat.
503181
No only the females are black with the red hour glass.  The male of the species are a brownish color and do not have the red.  You can always recognize their webs.  They are more random not a tight weave as some spiders and the strands are very strong.  I hear they kill their mate after mating and that is the reason for the black widow name of the species...smart spider.
2876
It's possible, but very, very rare. Most spider wouldn't be crawling on a bed, as most house spiders like the floor (especially places that aren't disturbed very often, like the basement). Spiders also don't like to walk on moisture or in windy places. So they wouldn't be likely to go into a mouth with moisture and breathing. One other thing is that even when people are asleep, I don't know how easy it would be to swallow a spider that doesn't want to be swallowed.
36146
NO. The human body does not contain a condition conducive to spiders. There are thousands of species of spiders, the majority prefer to live outside.  A few spiders prefer to live indoors; common 'house spiders' or 'cobweb spiders' can be found in anyone's home but do not need nor desire a human host.
796504
Any spider with a "fat round body" as you put it, is most likely a garden spider family Aranaeidae. These are the very commonly spiders that build large round "typical" webs between bushes, trees and on people's front porches. They are very effective at catching and killing large flying insects, so let it be, it'll do more good than evil. None of these spiders are venomous to people, most (even the big ones) arent even able to deliver a bite, so no worries, hope this helps!
282936
spider bites... some spider bites block out the nerve transittion and others over stimulate it... venom of any creature really but it would have had to bite your fingers or your hand.
855812
I not sure, but, sometimes I play with these fuzzy little spiders as they seem to enjoy it. I poke at them with my finger and they run and then jump on my finger and look around as if they playing. As I look at them they seem to take on a personality that seems to have a face, including a nose. ;-)
582128
Just so you know... spiders and scorpions are not insects (not belong to the Class Insecta), the belong to their own class: Arachnida.\nInsects have 3 pairs of 'legs', spiders have 4 pairs. That is just one of the *many* differences.
1076628
I think there called zebra jumpimg spiders--- http://en.wikipedia.org/wiki/Zebra_spider
131518
In some countries spiders are considered good luck, and killing them is inviting trouble.\n\nThere are special insecticides for spiders that could be sprayed in corners and along baseboards, usual happy dwellings for spiders.\n\nBear in mind that if you have spiders, they aren't going to spin webs where there isn't a food source, so they are killing insects to survive.\n\nIf you have someone in your household who isn't afraid of spiders and you want them out of your house, the kindest thing is to catch them in a jar and let them loose outside where they can either respin a web or become food to lizards and birds.
1176508
Several answers to your question, actually:\n1) Because they are so effective in their ecological niche, there is no evolutionary pressure to grow any larger -- they do just fine at the size they are currently at.  If growing bigger conferred an evolutionary advantage, they would gradually do so.  And bigger is not necessarily better; since they are not at the top of the food chain, the bigger they get, the more easily they may be spotted by potential predators and eaten.\n\n2) Spiders are physically incapable of growing much bigger than they currently are, because of how they're put together -- since their bodies are supported by an exoskeleton, all their soft tissues are sort of slopping around inside a hard shell, and if they got any bigger, these tissues would only sag under their own weight and become useless.  Also, spiders do not possess a circulatory system like larger animals -- they breathe through "book lungs," which are kind of like gills on the underside of their abdomens and deliver oxygen directly to some of their tissues, while the rest are served by spiracles, little air tubes that lead from various points on their legs through the soft tissues.  Grown any larger, and they simply couldn't have enough transport mechanisms to oxygenate their entire bodies efficiently, and they'd be prone to suffocation.  You'll notice that the larger a spider gets, the more it tends to become spindly -- those big Mexican cave spiders may have a three-foot leg span, but their bodies are still only the size of a small rat and their legs are just long spindly things. \n\n3) As another poster mentioned, what would they eat?  Larger predators require greater energy input to maintain themselves, so unless you're talking about a world full of giant bees and butterflies, it would mean they would evolve to compete in a new niche, hunting small rodents or fish (though one spider actually does catch small fish), competing against snakes, birds, and carnivorous mammals for food.  There's a lot more to eat down where they are in the middle of the food chain than there is at the top.
547417
It takes up to 30 days for spiders to run thru your site.  ANd that is still no guarentee you will be #1.
500243
Spiders are scary because they are creepy, crawly...just the thought of them crawling on someone usually makes them freak out.  Plus some of them are poisonous, so it is natural to be afraid of them.  I would wonder why you love them.  As in, you love to eat them, love to look at them, or what?  Maybe you just enjoy being different.  I don't like spiders (especially on me), but I don't hate them (they eat mosquitoes and I hate mosquitoes), and I admire spiders, they are cool arachnids.
493348
Spiders have several spinneret glands located at the spider's abdomen which produce the silken thread. Each gland produces a thread for a special purpose. Seven different gland types have currently been identified, although each species of spider will possess only a few of these types, never all seven at once.\n\nNormally a spider has three pairs of spinnerets, but there are spiders with just one pair or as many as four pairs of spinnerets, with each spinneret having its own function.\n\nWebs allow a spider to catch prey without having to expend energy by running it down. Thus it is an efficient method of gathering food. However, constructing the web is in itself an energetically costly process due to the large amount of protein required, in the form of silk. In addition, after a time the silk will lose its stickiness and thus become inefficient at capturing prey. It is not uncommon for spiders to eat their own web daily to recoup some of the energy used in spinning. The silk proteins are thus 'recycled'.\n\nSome spider silk strands are stronger than steel strands of the same thickness; the micro structure of this material is under investigation for potential applications in industry.
271631
The SPIDER was trying to built his house.BUT there was a tooooo big rock behind him and his brave was not enough for to jump up to the rock and shout a big: I want to win !!!! I never mind how will be, maybe i missunderstood sg.... But the spider was not enough brave and was staying ,staying, staying .... for abt 50 yrs....\nbut i cant understand,it its wanna go down,why trying to go up 3 and down 2,bec at the end spider wont arrive down  but will arrive up!