how does a spider find out it can climb walls??

Question

and why does it want to climb it anyway??

Answer 1

Nobody told the spider it can't climb walls, so it does. And it does so because it can.....

Answer 2

The spiders have that natural instinct. They have that something on their legs that stick or suck at the wall that they will not fall. They wanted to climb on higher places where they feel safe from dangers of their enemies, and they can build their web to catch their food.

Answer 3

I guess is it's nature, the same that made us walk, or climb a mountain... so, I think they also do it seeking for a good place to make a home, and get more food with no danger.

Merci!!!

Answer 4

I was born in the top corner of the bathroom. I wanted to get down to the bath for a drink of water. it was so easy. Now how the hell am I going to get out of this darn bath?

Submitted by S Web

Answer 5

They probably are not in conscious control of their ability. If the claw slips they erect their scopulae (foot hairs) automatically. Their ability is hardwired in. Are you aware of using your toes to balance? Perhaps spiders feel or sense surfaces to be more or less solid so adjust to hold tighter as needed. If their foot finds a place to fit they step on it. If not the claw grasps. If the claw doesn't hold they 'stick' on. So just as we adjust to walking on broken ground they adjust to the surface they walk on.

The tips of the spider's legs have two or three small claws that are used for climbing or grasping the spider’s silk thread. Many ground spiders have specialized adhesive hairs beneath their claws, known as claw tufts or scopulae. These claw tufts enable the spiders to walk surefootedly on smooth, vertical surfaces—even upside down on glass.
Each individual scopula hair splits into thousands of tiny extensions known as end feet. These end feet increase the number of contact points of the spider's foot with the wall surface, creating great adhesion. This is similar to the adhesion of skinks and geckos, which can also walk on ceilings with ease. The scopulae can be raised or laid flat by hydraulic pressure through blood pressure changes just like other erectile organs.
Image of foot
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6X1J-4CCCNYB-R&_user=10&_coverDate=06%2F30%2F2004&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=712fcc3b6642865731891d5d99eafb2c
“By using a hierarchical structure down to a submicron scale, jumping spiders are able to interact with surfaces at a molecular level,” explains Andrew Martin of the University of Applied Sciences.
A micron is the size of a bacteria or one millionth of a meter.
So the spiders foot hairs hold any surface because at the level they interact is very close to a permanent bond. Molecules act by creating bonds with different lengths. Covalent bonds are the shortest. Ionic bonds are looser and longer. Next come bonds of close positions and a very temporary nature, like water forms. These are Van Der Waals forces. Water molecules array in near proximity and cling together. To us this gives water the feeling of semi-solidity or density we associate with a fluid.
Spiders often hunt using visual cues. A high position gives them a range to view from and to drop onto prey or even find it since many insects fly. They also use altitude for their aerial dispersion. Little spiders spin out a silk line until the air lifts them. It will carry them farther from a higher starting point. A spider intent on ballooning climbs to a high point and turns to face the wind.
http://www.the-piedpiper.co.uk/th11f.htm

Answer 6

Actually spiders are surveyers,they keep looking up for a bedroom to crawl in.

Answer 7

well usally spiders are born on webs off the ground so they probably learn when there born. as they were probably born upside down.

Answer 8

I haven't been reincarnated as a spider [yet] so can't tell.

Answer 9

How did you find out you could walk? And where do you want to walk to anyway??

Answer 10

It's born on one. There's more food up high.