The white crowned sparrow is a common Emberizine sparrow that is found throughout all of North America. These birds nest in Northern Canada as well as the Rocky Mountain region. They winter in the southern US and Mexico. For those of us here in Minnesota we usually only see them in the sprint and fall when they migrate. I photographed this bird in Yellowstone. This is nesting territory and since there were quite a few singing in the open fields I am guessing it was time to find a mate and settle down.