The Cate’s Turkey is an unassuming looking, yet highly effective, mayfly nymph imitation fro both still water and streams.
Cate’s Turkey
Hook: Grip 12804BL #14 (or equivalent)
Thread: Benecchi 12/0, black
Rib: Wire, gold fine
Tail: Lemon woodduck barbs
Abdomen: Mottled turkey barbs
Thorax: Peacock herl
Legs: Lemon woodduck barbs
Video here - please view in HD, if able:
http://www.youtube.com/watch?v=f8tg_duaJAU
Cheers,
Hans W
Great pattern that doesn’t get much attention. I always have a few in my box.
Hans,
Nice fly. Do you fish this pattern often?
Any hatching conditions trigger its use?
Byron,
Not really - I have fished it a couple times on lakes. I am, however, much more a streams person and there I have preference for other patterns.
The Cate’s Turkey is an established classic pattern, and one I like - which made it a candidate for doing a video 
Cheers,
Hans W
I have used it mostly on lakes but can be used in streams as well. It probably mostly imitates a Callibaetis nymph, but it could be taken for any small critter swimming or crawling around. I have even fished it like a chironomid at times. In streams it could be used as a Baetis nymph or as a general mayfly nymph.
Hans Do you weigh the flies some way to get them to sink?
Notice many of your flies do not list weight.
Rick
You are correct. Most of the time I attach a twisted lead strip or split shot to leader, not to fly.