Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
Two years ago on the lower end of Penns Creek, just uo from Weikert, I lost a beautiful Brodin "Gallatin" net with the "Ghost" bag. Posted my loss in a couple of forums, stopped by the fly shop on the river, and offered a $50 reward. Never heard a work.
I don't know why but over the last ten years I have lost five fly boxes of dry flies on the West Branch of the Delaware. The first loss was a Myran plastic box about 1.25" x 4" x 6". It was full of Hendrickson & Red quill emergers, duns, and spinners. Also over a dozen Para leps. Well over 100 flies. Then I lost a large ripple box 4" x 7" just crammed full with GD & BD nymphs, emergers, duns, and spinners. Next a small Myran box filled with over 100 Trico duns and spinners #20 - #24. Then a C&F box filled with freshly tied #16 & #18 Sulfur emergers and duns. Lastly another small Myran box with about 80 ants of various colors, winged and unwinged, and various bettles.
I re-tied all the flies except the ants and beetles. Now I am constantly checking to see if my vest pockets are zippered shut.