The Boeing Bird of Prey is an American black project aircraft, intended to demonstrate stealth technology.

Development of the Bird of Prey began in 1992 by McDonnell Douglas's Phantom Works division for special projects, at Area 51.

The aircraft's name is a reference to the Klingon Bird of Prey warship from the Star Trek television series.

[1] The Bird of Prey was designed to prevent shadows and is believed to have been used to test active camouflage, which would involve its surfaces changing color or luminosity to match the surroundings.

[3] Because it was a demonstration aircraft, the Bird of Prey used a commercial off-the-shelf turbofan engine and manual hydraulic controls rather than fly-by-wire.