Hovering Flight (4e Feat)
From D&D Wiki
Hovering Flight [Racial]
You have mastered flight completely. Not only can you stand long stretches of all-out combat flying, your wings are now powerful enough to keep you in the air even without moving forward!
Benefit: You now fly as a hoverer. You do no longer need to move each turn to stay in the air, you threaten the squares around you and may make opportunity attacks when flying.