Dubstep Bird is incredibly strong and is crazy. He flashes bright colors everywhere.
His noise when you pull him back is a very low pitched WUUUUUHHHHHBBBBBBBBB.... and when you release it is begins leaving a trail of sparks, that glow. It then screams a very high WUKKA WUKKA WAAAAAAHHHH WAAAAHRRRDDOOOOOOOIIIIIIIIOOOOOOOOO. When you tap the screen, he blows up.
The sparks all fly in random directions, each causing light damage to everything it drops before turning into smoke. When you tap, he goes super fast and begins rapidly vibrating, shortly before glowing pure white, and exploding and shooting out many sparks.