A basic emerger for the larger sizes of mayflies. It holds the properties i like the most for the hatching BWOs (especially the Baetidae family). It is a floating nymph and is fished rather deep in the film. The nice segmentation of the turkey biot, combined with the buggyness of the thorax and legs, it’s worth a try when your fishing early in the hatch cycle.
The pattern is not very well suited for the second generation BWOs, but good for the larger first generation BWOs (best for hook sizes 12-14). Vary the color to match the hatch and local variations.