The peregrine falcon is considered as the worlds fastest bird. The maximum speed attained by this is 320-563 kmph and u should keep in mind that its not the horizontal flying speed it is the speed attained while diving…. While the horizontal speed is 70-80kmph..
One more interesting bird is the white-throated needletail it is the second fastest but when it comes to the horizontal speed this will be the winner. The speed attained is 170kmph….