This is a fan art of WAYNE BARLOWE'S EXPEDITION. Skewer is a flying creature on Darwin IV the planet on Expedition. It has 4 bio-engines on its wings and can fly quickly on sky cos of these engines. When skewer hunts its game, it uses boom-and-zoom tactics and stabs neck or body of its victim with its long mouth like a needle.
This pic is a subspecies of skewer. Horten skewer is motivated for Horten Ho 229, ww2 german jet fighter. Ho 229 was like a B-2 stealth bomber. But it was a bi-engine fighter and interceptor and its main target was bombers like B-17, B-29, and Lancaster.