First Robin of Spring - the "Spirit of Spring Sketches"

A few weeks ago in early Spring I was inspired to sketch a small tree outside my window across my driveway that was just beginning to get earlier than usual beautiful little white buds. About halfway through the sketch, when I was working on the upper area, a robin flew in and landed right in the perfect compositional spot! As if it was sent by the "Spirit of  Spring Sketches". I took it as nature's spontaneous way of contributing to my effort. It stayed just long enough for me to include it in the sketch. I scanned the sketch in and added a little color in photoshop.

This is the full sketch from my sketchbook without any added color.