I drew these for Christmas presents this year. They co-inside with an upcoming tutorial on sketching trees. The above where started in graphite on Canson 140lb watercolor paper.
Then I add the dark and detail with Charcoal.
I have more control shaping with graphite in the initial stages, which also allows me to sculpt with the eraser easier than with charcoal. Both of these are done on 11x14 inches paper with a display area of 10x8 inches.
The drawing on the left resides in a private collection in New London Ct, while the one on the right was a gift to my wife. Drawing nature is satisfying...creating a snapshot of the world around us.