Keep Your Nose Clean

Keeping one's nose clean is an American idiom dating to 1887, and at the time it meant to stay on your best behavior and be presentable. These days we use it to mean stay out of trouble.

Was out taking photos of waterfowl (nice one of a pied-billed grebe as an extra) when this robin cocked it's head and stood 2 meters away looking at me. Took advantage of the pose despite and maybe because of the dirty nose.