The Livid Birds add the most destructive bird of the game they imitate: the yellow bird. The weapon fires a red bird that had its damage reduced to 20, then the blue bird, that now only does 10 per projectile and then the yellow bird that deals 40 damage. As a being of pure hate the yellow bird accelerates shortly before impact, which may lead to it missing where your other birds hit. Because of this and for the same reason as the Furious Birds a short range attack with about 45 degrees is the best way to go about things, since this is the best way to hit all the birds, which is necessary, because the guaranteed hits are only the red and 1 blue bird otherwise, which would only deal 30 damage.