i think they were wrens. what happened, from what I read, was that the plane was at low airspeed, and the wings lost lift. On this plane and on a real B-52, they have no ailerons, but spoilers on top of the wings. and it works by extending the spoilers into the airstream, and it pushes the wings down. Here is a little more on the B-52 wings.
The wing of the B-52 has a sweepback angle at the quarter chord of 35°, an aspect ratio of 8.56, and airfoil thickness ratios that vary from 14 percent at the root to 8 percent at the tip (these thickness ratios are only approximate). Fowler-type single-slotted flaps for lift augmentation are located at the trailing edge of the wing. Hydraulically actuated spoilers are used for lateral control and, in the symmetrically deployed configuration, assist in flight-path control during landing approach and braking during rollout. On the A through F models of the aircraft, lateral control was provided by the spoilers working in conjunction with conventional ailerons. Wing area of the B-52 is 4000 square feet, nearly three times larger than that of the B-47.
