A small, slender European hawk (Falco alaudarius), allied to the sparrow hawk. Its color is reddish fawn, streaked and spotted with white and black. Also called windhover and stannel. The name is also applied to other allied species.
The Kestrel engine is an RP-1/liquid oxygen pressure-fed rocket engine. The Kestrel engine was developed by Space X for upper stage use on the Falcon 1 rocket.
John Wraith, a.k.a. Kestrel, is a character in the Marvel comics fictional universe. Kestrel was a member of Team X and later a test subject of the Weapon X Program.