Atomic Bomb blast with shock and effects in HD

These clips are from shot Grable, the Atomic Cannon test in 1953 showing the initial burst and shockwave. Identified also are the various vehicles on the desert floor which are very, very tiny compared to the fireball of the blast. There are cars, jeeps, buses and tanks under the blast area. I have put a title over a frozen frame to be able to see the positions of the vehicles. Can anyone find the bird?