Hi Geordie. I've also seen Green Drake spinners during the early and late hours, and even a couple of times during the day. Tying the spiner is pretty easy.
Tail: A few moose or elk hair fibers
Body: Brown dubbing - I've used various shades but like a medium brown
Rib (optional): A stripped small hackle feather, tied in tip first at the tail
Wing: Poly yarn, white CDC, or Z-lon
Underwing: peacock herl - wrap a little of this on the hook shank between the hook eye and body, then tie the wing on top of it
I'll admit I'm not the most experienced tier in the world, but this is an easy to tie pattern that even I can do.