Good looking pattern, and tie as always, Scott. What in your mind, however, makes this a grey drake, other than the size? Not a hatch I’ve ever experienced (knowingly) but this looks more like a general attractor than anything else.
The site I pulled it from had 4 variations in different colors - white, yellow, green and brown. I don’t think any of them were for a specific hatch (the green and brown bear little resemblance, colorwise, to any drakes I’ve seen) so they, and this one, should be probably be viewed as attractors. The only Grey Drakes I’ve seen were during a spinner fall at Fishing Bridge in Yellowstone; cutts, some very large ones (this was in '97 before whirling disease and the lake trout had knocked their numbers down so much), were lined up gulping the spinners as they floated by.
