The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from The Life of the Spider by J. Henri Fabre: come from their tent among the leaves as readily as from the centre
of the web; they explore it with their palpi and their legs; but,
soon perceiving that the thing is valueless, they are careful not
to spend their silk on useless bonds. My quivering bait does not
deceive them. It is flung out after a brief inspection.
Still, the clever ones, like the silly ones, run even from a
distance, from their leafy ambush. How do they know? Certainly
not by sight. Before recognizing their mistake, they have to hold
the object between their legs and even to nibble at it a little.
They are extremely short-sighted. At a hand's-breadth's distance,
the lifeless prey, unable to shake the web, remains unperceived.
 The Life of the Spider |