How Do Spiders Stick To Walls. These tiny setules — more than 620,000 in all — give spiders their superior ability to climb up water spouts, along walls and across ceilings. Tiny hairs a spider has more than half a million of these setules, all of which end in a triangular tip.
A phenomenon known as the van der waals force, produced by the setulae of spiders, gives them a kind of magnetic grip with the surface. This seems unlikely, as evolution has never produced a body plan like this. He basically control his attraction to walls and any other objects, mostly he uses his hands and feet for better navegation on the wall.
