Thank you. It is more mind bending than I mistakenly assumed.

Congratulations Asbuu, ToastLover and eMouse! You are correct. When I created the device, I have done a very simple test to prove that the bird we are seeing is, in fact, the front bird and not the bird on the back. I have removed all the birds and left only one to be seen when the device rotates. The result is that,…

What ToastLover says is correct. Consider this: the outside of the center is black, but when it’s spun it turns white? Why? Because the ‘white’ we’re looking at is actually the slits showing the white interior. It’s moving fast enough that our brain (and the camera) blurs it into one continuous solid space.

Nope. We’re seeing the birds in the front. But the slits show us the bird beginning with the beak and ending with the tail feathers while they’re moving to the left thus inverting the image.