Photos from left to right: Dye based ink made from foraged plants Yellow ochre pigment mulled with gum arabic binder into watercolor...

I have been hiking in the Clackamas River watershed for decades- first as a recreationalist, then as a volunteer with Bark groundtruthing...

We have many birch trees at our house and when we pruned off some large lower branches I was able to pull off the bark in sheets to use...