Glints and Halos at Whistler, Canada imaged by David Hayes, December 2007. A display like this brings home that halos are the collective glints of millions of crystals be they in nearby diamond dust as here or in high clouds. Two sundogs flank the sun. They are joined by a parhelic circle lit by crystals in front of the dark trees. There is a hint of a pillar and the display is crowned by an upper tangent arc atop a 22° halo. ©2007 David Hayes, shown with permission.