I am amazed at his keen observation skills.

His eyes were sharp, as if nothing could be hidden.

His sharp gaze pierced me.

The bird of prey was flying high in the sky, looking for its prey.

I saw various kinds of birds in the park.

Cut your nails.

She had her nails nicely painted.

She cut her nails using a nail clipper.

He pointed out people's flaws, saying 'there are claws in the melon, but none in the claw.'

He is known as a fierce and brave warrior.