Shadowing. Err... Shadow-wing. You have to say it
This is all that is left of a T-2000 Raptor sent back from the future (2002) in an attempt to assassinate, I don't know, some sort of young bird that would have grown up to lead the avian resistance (the RSPB?) against the ProperlyInTheSkyNet thing that was attempting to subjugate all bird life. The Raptor was destroyed apart from these few body parts which, of course, would, in a neat bit of circular (or, possibly, egg-shaped) logic be the key that allowed robot birds to be created in the first place.
I sense a sequel. Or a franchise.
All very paradoxical. Or is it?
When is a paradox, not a paradox?
Answer: When it's a paradox.