Sketching On A Summer Evening

I've always admired the way sunlight and shadows move in the branches of ancient live oak trees. Lately I've been sketching these light effects and the movement of moss blowing in the summer breeze through the trees. I'm hoping to be able to evoke  the spirit of these graceful trees in an upcoming series of paintings. 

Here's a recent sketch I did of a moss covered branch of a live oak in the evening breeze.  Love these old oak trees - so strong, enduring, and graceful in all types of weather...