What it represents? I have no idea, but it's a very simple fly to tie, and very effective as well.
Hook: TMC 102Y or any dry fly hook, Size 12 down to 18
Thread: Danville's 6/0, black or dark brown
Tag: Red wool
Body: Peacock-fibres, ball shaped
Hackle: Brown cock
Good step by step Hans.
If I may point out though, that is the dry version. If you substitute hen hackle for the cock you have a very good wet fly.