Most flyfishers hunt bass either with surface poppers or streamers and creepy-crawly leech things that measure about 3 to 31/2 inches long. If you're trying to imitate the profile of a big jerkbait, however, that's not nearly long enough. Here's a good gauge: with your hand open and fingers extended, check the distance between the tip of your middle finger and at least the middle of your palm. That's about the right size for a fall or early spring flash streamer for bass. Shad, perch, smelt and alewives are great colorr/pattern archetypes. Captain Dave Beattie of Epping, N.H., makes a deadly factotum of a streamerÃƒÂa multitasking pattern with grizzly feather flanks that freshwater bass just can't let go by.