Shedding bark

Today I noticed the large pine tree in the front yard had shed lots of bark over the winter.  This I know as I had cleaned up all the shed bark last Fall before the snow fell.  I guess it is part of the growing process for some of these pine trees as I don't notice other trees shedding bark quite like this tree.  On the other hand, this is one large pine tree.

P.S.  Don't let the bare ground lull you into thinking the snow is gone here. Far from it!  The area in the photo is of this large tree's rain shadow.