The spwuce moffs and butterflies are out in full effect so I thought I'd write a little bit about my experiences. Spruce moths are not aquatic, but for some reason they hang out by the water. I've heard all sorts of theories, including that they need to drink or they are attracted by the reflection. Who knows. They are locally abundant. One stretch they will be all over the place, then nothing. They've been all over the treed stretches of the Blackfoot and, of course, Rock Creek.
In some places, the fish have gotten pretty picky about the imitations. A few days ago, on a quiet small stream pool, Entzrix and I watched big cutthroats occasionally refuse real moths that were floating by. Needless to say, it was tough to fool them with an imitation. I'll have a video up for a pattern I've been tying that works pretty well.
The spruce moth should not be confused with the larger pine butterfly, which is also all over the place, with a bumper hatch this summer. While the spruce moth is imitated with a #12-14, the butterfly is larger. Both can be important. A chubby chernoble is a pretty good butterfly imitation. Stay tuned for a video of BP's Foamy Spruce Moth later today.