I love the idea of the leap from birds to planes here. Photographically, this image needs a solid depth of field (DOF) though, meaning the plane is just outside of the DOF. My preference would have been to stop WAY DOWN (f/30+), to increase the area in focos. Good cropping, and I like the desaturation for this image! Good studio setup.
My only complaint here is that the lighting setup is a bit dull on the plane. The skull has nice variation in tone, but the plane has come up rather flat and boring in BW, and also a little bit soft, which would be helped by a smaller aperture.