What do you all think about putting a "hot spot" on a nymph or other fly? This is usually a small amount of bright color, such as a couple turn of bright red, flourescent pink/orange/chartreuse dubbing added into a fly. Europeans do this a lot- an example would be putting the bright dubbing between the abdomen and thorax sections on a Czech nymph. Sometimes they use the same color but use a couple or turns of flashy stuff like Ice Dub. You could argue that the white biots in the wing of a Prince Nymph are a hot spot- a light color that stands out against an otherwise dark fly. Many Great Lakes Steelhead flies use hot spot- a Pheasant Tail or Montana nymph tied with a flourescent pink, orange or chartreuse thorax. A black stonefly tied with a wingcase of sparkle or diamond braid in a funky, contrasting color (blue, red, chartreuse, copper, etc). Or tying a trout fly in a drab color but making a prominent head out of fire orange tying thread. An egg sucking leech. I tend to think that incorporating "triggers" like this is often effective. But it's also good to have natural, plain, drab flies that look like the naturals do. Showing the same fish and unnatural fly, over and over again, can turn them off. But... that little something extra can sometimes make your fly stand out in a good way, and the fish will single it out over a natural. Similarly, low light or dirty water would also tend to favor flies with hot spots/triggers. I guess you could consider flashback nymphs to fall in this category too. What do you guys think about all of this?