The first dry fly I was taught to tie was the Grey Duster

http://www.sexyloops.com/flytying/greyduster.shtml

- without a tail, as is traditional.

Rabbit underfur is very easy to dub, and the traditional tying doesn't
have a tail.

It's a very easy fly to tie, teaches essential techniques, and is a
fine general upwing (mayfly) imitator.

Laz`arus