The various other popular view on the concern is that they take based on aggressiveness. When they see a little fish in their location they get flustered as well as they go after it. With swing flies the fly will resemble its running away the area due to the presence of a bigger predator which's when the steelhead strikes. This is the thought behind Spey fishing.
Many of us come from a trout angling background and are relied on to fish behaving in a rather foreseeable way. If there is a caddis hatch taking place as well as you can literally see trout actively feeding for caddis there is a good possibility that if you rely on a pattern mimicing a caddis you're going to apprehend a trout. There is a direct and obvious correlation between just what fish are feeding on and also what will certainly offer you the very best possibility for success.