The Giant Claw

The Giant Claw is the titular antagonist from the 1957 B-movie The Giant Claw. This feathered alien menace came to Earth to lay off his eggs and wreak havoc while he's at it. It is protected by a antimatter shield, which deflects all artillery, including rockets and cannon-fire shot at it. The monster is finally killed when the main character creates some applied phlebotinum that nullfies the antimatter shield, allowing the army to shot it down.

The monster, which was supposed to be something like a phoenix, was made using a crude puppet which resembled more of a buzzard, such that many websites make fun of it by calling it the GIANT ANTIMATTER SPACE BUZZARD. In fact, the live-action scenes of the movie were filmed first with the puppet footage inserted after.