The dryfly Dyret is well celebrated among many Scandinavian fly anglers, and originally it was tied with more natural colors, like brown, grey and olive, to imitate caddis and stoneflies. The originator of Dyret was Gunnar Bingen.
I have found a black variant of this classic pattern to be a real effective fly, and I have even made trout that wasn't rising come up and take this on the first cast.
Svartdyret (Black Animal)
Hook: Standard dry fly hook size 14 and smaller
Thread: Black
Tail and head: Black deer hair
Body: Black poly dubbing
Hackle: Black rooster
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All photos are taken by me and shall not be used without permission.