it's not like they have a rope and a grappling hook...
2007-05-01 03:02:31 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Biology
They depend on air movement (however slight) to get the first strand of their web started. They start spinning out the web and wait for the slightest air movement to move the end to something stable. The end is sticky enough to attach to whatever it bumps into. From there, the spider attaches the other end to whatever it is standing on and begins the process of going along that thin bridge of silk and spinning its entire web.
2007-05-01 03:21:07 · answer #1 · answered by Joan H 6 · 2⤊ 0⤋
They start on a leaf or branch or whatever and drop down to the next surface on their silk. In a way they kind of do have a built in rope and grappling hook.
2007-05-01 03:16:49 · answer #2 · answered by chickey_soup 6 · 0⤊ 0⤋
They spin silk and attach the line to something secure
2007-05-01 03:06:22 · answer #3 · answered by DAR76 7 · 0⤊ 0⤋