A pair of aerodynamic researchers at the École Polytechnique Fédérale de Lausanne (EPFL) in Switzerland have created a raptor-inspired drone that uses its tail feathers to control bank, rather than wingtip feathers mimicked by ailerons on airplanes. Hoang-Vu Phan and Dario Floriano built a feathered drone with morphable wings and a twistable tail that they have shown can induce bank angle.
Is this not pretty much the same as the horizontal stabilators that have been used by many fighter planes for the last 50 years, like the F-15, F-16, F18, F-22, probably the F-35? When a roll control is input, the ailerons as well as the horizontal stabilators deflect differentially.
A guy named Bob Hoey wrote that paper 30 years ago. He was an engineer at Edwards AFB and he even built bird shaped RC gliders. The tilting tail stabilizes and controls the bird in yaw. The tip feathers do more for control than most people realize too.