They have servos on the wings and neck of the birds. On the back is an rPi or some small computer. They have a long wire antenna (looked to be 1 meter long) d

They have servos on the wings and neck of the birds. On the back is an rPi or some small computer. They have a long wire antenna (looked to be 1 meter long) dangling from the computer. I am guessing they are controlling the servos via the rPi and doing midcourse updates over the air.