By John Mattingly The morning after a light snow is a revealing time to walk in the brush lands of the northern San Luis Valley. Fresh snow provides a relief map of the previous night’s activity, engaged in by other creatures that live here. The footprints of various rabbits and hares, mice and moles, numerous birds, raccoons and skunks, and occasionally deer and elk, pattern the snow under the slanted light of approaching winter. You might even see a bobcat or big cat track, on the rarest of occasions. The light snows this fall have allowed us to track mice ...