The square red knob next to it would close it.

He depressed a red knob atop the unit to shut it down.

It was black, with red and white knobs on the top.

It has a red knob near the base of the bill and white stripe behind eye.

She saw it, a red knob the size of her thumb, and pulled it out.

Long pale nose, with a red knob in the middle.

Its bill is blue/grey with a large red knob at the base.

His nose under the sky-blue eyes was a little red knob.

Cullin reached out and turned the red knob to the right.

I saw the red knobs pushing up anc covered them over again.