In hunting one used peripheral vision to spot movement and it was the same with a problem.

The instant he did so, he spotted movement from the far side of Saturn.

He spotted movement behind a steel trash barrel in the middle of the compound.

Here and there he spotted movement in the hills which indicated the presence of patrols.

But then, spotting movement on the road, they had moved forward to investigate.

Anybody up there could spot movement on the road below.

She could spot movement in four different places.

The mountainous range also allowed revolutionary soldiers to spot British movement.

Then he spotted movement on the flank of the dying sub.

He spotted movement behind the line and off to the side, and turned to look.