A reed of grass placed between thumbs. I had to learn to call pheseants before I would be allowed to use my brother's bugle, or so I was told by "Little Bill". After that, I was relegated to "fist trumpet" while trying to work up to the bugle. But, with perseverence, I mastered it. Even then, I was allowed only the mouth piece until proficient with it. However, all was lost when, one Sunday morning early, I let loose a call for infantry charge that apparently brought back some sour memories for dear old Dad... and sour memories for my backside !I haven't plyed the bugle for thirty years... my ass is still sore !