Winged Anomaly 'Bird' captured by Curiosity on Mars

The black object in SOL 2446 clearly shows characteristics of a winged anomaly that flies independently through the sky, whether it is a UFO or a bird.

It certainly is not a camera error or dirt on the camera lens since this object only appears in 1 image taken by the Curiosity. The images taken shortly before and after do not show the object.

Link SOL 2246: