Wohoo! Time to break out the Crayolas!
And I never noticed it before, but, yes, according to the majority of the poster and ad artwork for the The Giant Claw, the Anti-Matter Buzzard's head is shoved up its own Anti-Matter ass. (That thing trailing off the top is not the neck, folks. THAT'S THE TAIL!)
Other Points of Interest:
The Giant Claw (1957) Clover Productions :: Columbia Pictures / P: Sam Katzman / D: Fred F. Sears / W: Samuel Newman, Paul Gangelin / C: Benjamin H. Kline E: Tony DiMarco, Saul Goodkind / M: Mischa Bakaleinikoff / S: Jeff Morrow, Mara Corday, Morris Ankrum, Louis Merrill, Robert Shayne, Edgar Barrier