Is it a bird, a plane..?

During Sunday's race at the Circuit of the Americas, an overhead camera pointed at Turn 1 on lap 48 suddenly captured a large flying shadow creeping into the frame.

While the presence of birds of prey in the Texas skies is hardly unusual, the massive size of the silhouette was striking - practically twice the size of an F1 car!

Any keen ornithologists out there among our readers?

Update: The case has been solved!