Monday, January 7, 2013

How do spiders catch its prey?

                              How do spiders catch its prey?

We know spiders spin web. It starts laying out radial threads from the centre to the boundary of the frames. These radial threads are not coated with sticky material , since the spider needs to walk across them to get around . This is how spider lays its web.
The spider is now ready to hunt. It sits in the middle of the web , monitoring the radial threads for vibrations. When an insect gets trapped in the web , spider feels the motion and briskly makes its way towards the source of vibration.
Spiders do have special abilities to tell the difference between vibrations from the prey and vibrations from other sources ( like leaves etc ) . Now spider inject its prey with neurotoxin to paralyze them . The spider can feed on its prey  in safety.
After paralysing them , spiders usually wrap its prey in silk and carry them back to their nest to be eaten in leisure they inject the prey with digestive enzymes , suck up the liquid matter , leaving the outer skeleton intact . . 

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