Birds and Spring

I heard birds!  Of course there is nothing too unusual in that statement except in the details.  About every day we hear birds as the migratory flocks fly north.  We've heard and seen Canada Geese, Snow Geese, and Sandhill Cranes in the Dakota skies.  But this morning I heard birds!  Yes, I heard some pre-sunrise singers heralding the arrival of spring!  In the land of subzero weather that is music to my ears! Some say around here that spring is "around a long corner", but even if colder weather persists, I heard birds!