This one's as cheesy as they come the concept of a massive and indestructible extraterrestrial bird is already too loopy for words, but wait till you get a load of the goofy creature as it appears on screen! I tell you I laughed so hard through this thing that I missed out on some of the expository dialogue then again, the latter is often so heavy on scientific jargon and laws of Physics and such (at which I've never been any good, in spite of my love of sci-fi movies) that it didn't really matter anyway! The bird first depicted as a mere blurred form whizzing through the skies but subsequently shown in all its dopey glory is so sublimely silly that it wouldn't be amiss in a Looney Tunes cartoon (witness the series of intermittently-taken photographs that start with the creature in the distance and end on a side-splitting extreme close-up of its face)!
Director Sears had fared much better with his other film about UFOs, the fine EARTH VS. THE FLYING SAUCERS (1956) with special effects provided by a master, Ray Harryhausen (speaking of which, I've just given away my copy of the latter in anticipation of acquiring Columbia's recently-released SE DVD); also, it seems to me that some of the footage illustrating the bird's rampage in New York here were lifted from the destruction of Washington seen in that earlier sci-fi classic! Again, the leads are played by genre regulars namely Jeff Morrow (from THIS ISLAND EARTH [1955]) and Mara Corday (from TARANTULA [1955]); as with the afore-mentioned FLYING SAUCERS, these titles are highly-regarded and beloved by fans consequently, they are vastly superior to this lamentable addition to the alien/monster animal cycle prevalent during the sci-fi heyday and beyond (incidentally, other flying menaces were featured in THE FLYING SERPENT [1946], which I haven't watched, and Larry Cohen's tongue-in-cheek updating of same in Q: THE WINGED SERPENT [1982]).
Unfortunately, THE GIANT CLAW can't even rise to a decent climax which is so rushed as to be "a wash-out", to quote a jet pilot from the film itself whose assault with rockets on the bird proves completely ineffective (that is, before Morrow realizes that it's shielded by an invisible barrier and then has to figure out a way how to be able to penetrate it). Ultimately, apart from the intractable (and frankly tedious) technical asides, one gets a feeling of "so bad, it's good" watching this: after all, it only lasts for 74 minutes and, in any case, the bird is such an unforgettably daft creation as to put a huge smile on your face every time it turns up!