Floating fry.
Yeah that's right, floating fry, and yet I'm still in Arpil. That's cos you can find mid-water fry feeding trout at this time. Admittedly the fry can be larger (Tampax size - not that I fish Baby Doll's, ever in fact). So the floating fry is a Booby replacement.
It's also a pretty good fly from about the first week of July onwards. Trout hit shoals of fry, the fry float stunned on the surface and the trout return to sip the fry down head first (it's a cruel world). Or at least that's what happens in the UK, not so sure about elsewhere. All you need do is simply cast into the activity and wait, when a trout does take you must delay quite a long time before setting the hook.
Seagulls also take this fly, and can be quite difficult to avoid, but we won't go there.
The Spondoolie is a waterlogged deer hair version, which can be quite effective but it's not so good on a HiD since it starts to sink after a bit.
Tying instructions:
Size 10 long shank, debarb, tie in strip of white ethafoam at tail. Silver tinsel body overwrapped with silver wire, pull foam over and whip finish. I varnish the head and body. Trim the tail... some anglers fork the tail, I tie it pointy.