1.New Special Solider: Bird Solider, Low Air Unit, Slightly Bigger Attack Range, Half HPmax
2.Special Wave Add Bird Solider Wave
3.Add Out Of Specific Ammo Hint When Attacking
Game Balanced：Bird Solider Is Low Air, The Improved Range Is Same To The Height, Melee Attack Is Not Affect, For The Original Melee Unit To Attack Only Need Little Close