Buzzard
The Buzzard is a small attack helicopter to be featured in Grand Theft Auto IV's The Ballad of Gay Tony DLC.
Similarly armed with machine guns as the Annihilator, as well as featuring missile pods, the Buzzard is evidently based on an AH-6 Little Bird, an attack variant of the MH-6 Little Bird light observation helicopter, which in turn is a military version of the OH-6 Cayuse and the MD 500C. It's important to note that the Buzzard has the old style tail stabilizer, characteristic of the MD-500C and its corresponding defender/AH/MH-6 counterparts.
The Buzzard, at least in Liberty City, is an illegal attack helicopter.