What animals spin?
One of the ways it for spiders to spin a web from one place to
another is to pull out sticky silk with some of their legs letting
the free end float in the air breeze until they feel, by the
special vibration of the silk that it has hit (and stuck) to
something. The spider then reels in the silk, making the line
taught. Now there is a line, a bridge to something that would have
taken many meters to crawl around to. Spiders (especially young
ones) also can use the pulling out of some silk trick to make a
kind of kite that the air catches and they can fly far away on a
few yards of thread.