Years ago back in the 40's when I first started tying, the very popular Woolly Worm patterns often incorporated a turn of red chenille near the rear of the fly. As I think of those patterns today, I can see that the turn of red chenille could easily resemble an egg at the rear of the fly.

Therefore, could we (or should we) really consider this pattern a "Leach Sucking Egg"?

Food for thought from an old tier.