Yeah, I think if it looks buggy enough and like something that is represented in that local stream at some point in time it will get eaten. This is why I like, actually love hopper patterns or ant patterns because they are always around. So fish being the opportunist for a fat meal that they are will always take advantage of a poor helpless terrestrial that happened to fall into the water, regardless of hatch. If you're a survivor you'll eat what's edible and in front of you. Less work more food? Fish says : YEAP!