Can someone tell me why there is a picture of a owl on the right corner of the back of the dollar bill?

Is that more of the "Free" Masons symbolism on the back of the dollar bill? Is that the Bohemian grove mascot? What about the pentagram that spells Mason on the back? How about the all seeing devil on top of the pyramid? Does Satan's secret society believe the pyramid is complete when Satan causes a unholy baptism on all humanity? I s that when the all seeing Devil is lowered down on the pyramid?