Flyby Attack( Monster Manual IV, p. 202)
A creature with this feat can attack on the wing.
Flyby Breath (DCS) , Strafing Breath (DCS) ,
When fl ying, the creature can take a move action (including a dive) and another standard action at any point during the move. The creature cannot take a second move action during a round when it makes a fl yby attack.
Without this feat, the creature takes a standard action either before or after its move.