Action is picking up on all of these. You can credit this improvement to warming waters bringing on some damselfly activity. Not many big emergences yet, but nymphs are moving as water warms. Midges will always be doing the same, so pupa patterns under an indicator will always work. Presentation is more important than pattern selection. Concentrate on shallow waters where vegetation is growing. Plants shelter food forms from scuds, damselfly nymphs, dragonfly nymphs, midges, and leeches. Floating lines are very useful now. Find the taking depth through use of an indicator for any of these. Intermediate lines are best for keeping flies submerged in shallow water this time of year. Fishing deeper water with faster sinking lines comes later in the year when shallows warm to the point where dissolved oxygen levels are uncomfortable for fish.