Most commercial bugs will cast better and still catch as many fish if arms, legs, and tails are thinned out. To you, it looks like a frog. To a bass, it simply looks edible. The shape of a bug is important not because it imitates known bass prey, but because it imparts a lifelike disturbance when you retrieve it. The bug's behavior on the water is the only appearance that matters.
Some situations call for an attention-getting pop.
At other times, a subtle burble or quiet slither triggers the attack. Remember, you don't need a steamer trunk full of bass bugs to be prepared for every occasion. If you carry just half a dozen bugs, you can usually stimulate a hungry bass' conditioned predatory response. The six bug types that follow are all proven patterns. The most versatile bug, and the one I usually tie on first, has a flat face, a tapered body, and a streamlined tail.