the origin of the name Woolly WORM might be lost in the past. Most folks agree that the Bugger was first credited to Russell Blessing, a fisherman from here in the Harrisburg area, as a suggestion of a Helgrammite (very common in the Susquehanna basin). The Worm was around for a long time before the Bugger, and it's the accepted convention to have a short red yarn tail on a Woolly Worm.
And no, a Woolly Worm without a tail is not a Griffith's Gnat, but a Griffith's Gnat IS a small Woolly Worm without a tail!
Not all birds are ducks, but all ducks are birds.