I developed the Euroflash Nymph in several variations in late summer and fall 2018. This is the production version, which will be available in the shop in March of 2019. This slender, tungsten-weighted nymph sinks like a brick and worked wonders for us on the Yellowstone and Gardner in red and purple versions late in the season. In fact, it was our best fly on our last guided trips in late October.
There are five key design elements that make the fly effective in its intended role as a slender, fast-sinking, flashy yet not ostentatious mayfly nymph. First off, the brownish tungsten bead is secured in the fly’s thorax, somewhat hidden by the wing case and the thread thorax. This somewhat mutes its flash while still providing weight. Fish nowadays can spook at beads, particularly in low, clear water, so this one gives the advantage of a bead’s weight without the prominent flash of a normal beadhead. Moving back, the speckled coq-de-leon tail provides variegation, while the Holographic Flashabou abdomen provides flash and hints of segmentation and variegation from the way the light reflects from it in different colors. The thorax and wingcase combination continue the theme of muted, somewhat three-dimensional flash. The wingcase is made from opalescent tinsel which reflects in an almost violet spectrum, but its color is muted by the brown thread underneath, making this flash subtle. Finally, the sparse Fluoro-Fibre legs do not retard the fly’s sink rate as denser legs can, but because this material is fluorescent and moves well in the water, it still provides the subtle motion and attraction of standard legs.
We’ll be stocking the pattern in the following colors for sure: red/black, purple/black, orange/brown (PMD), olive/brown (BWO), and black/black color combinations, all in #18. If we have time, we’ll also tie it in some other colors and sizes.
The olive and brown version is pictured above. This color combo works best in the Lamar, Firehole, and Madison, though it’ll also work on the Yellowstone and Gardner when the water is clear. It roughly imitates BWO (Baetis) mayflies, which hatch primarily in spring and fall, but occasionally in the winter too. So it’s a good choice from August on through into June.
Look for a fly pattern video covering the Euroflash sometime in the spring of 2019.