A time-honored rule in bass or trout fishing is to use small or dark colored flies in very clear water and during bright weather and the larger ones and the gaudiest colored on dark days, at night or when the water is discolored. This is a safe rule to follow, generally, except that certain sky conditions make a dark colored fly more prominent than a light one when fishing at night.
Style
Good winged bass flies are tied with the wings " reversed." That is, the wing is first tied under the body and then reversed and tied over the body making them much more durable.
Wings are usually placed where wings ought to be, but for fishing in weedy places bass fishermen often have the wings " inverted"— tied on the under side to cover the hook point and act as a weed guard. Another method much used on the Illinois River, is to tie a few horse hairs on the hook shank, immediately under the eye, of sufficient length to extend over the hook point. Either method, I believe, is superior to a wire weed guard.