I haven’t written an art post in quite some time … but I’ve noticed when I do I must have several artists as readers. It’s time I do one again. I should admit I wrote 'Field Sketching' (Feb 2012) and 'Sketching Versus Drawing' (March 2012) four years ago, but I think it is time to revisit the subject. When I was sketching Canada geese at our local duck pond the other day, I got to mulling over field sketching and how I learned to do it. I'll use Canada Geese as my example in this post, but…