this is the very essence of the Spider pattern - by using
a very sparse, often webby hackle on a very slim, short body,
you can create real movement in the current - resulting in
a very realistic impression of a struggling, crippled or
drowned insect, irresistible to fish!
A true North Country Spider should have
a fairly short body by modern standards - no longer than from
the eye to a point opposite the hook point or just past.
The body should also be SLIM - to match than
of an insect - so please do avoid those commercially tied offerings
purporting to be Spiders but tied with heavy floss resulting in
a body three to four times thicker than the hook shank and extending
way past the hook point.