The Nature of America stamp series from the USPS comprises 12 distinct ecosystems. The scenes are illustrated by John D. Dawson. My all-time favorite is/was the Northeastern Deciduous Forest panel. No surprise there. Sadly, these are not really available any longer. I saw a few for sale on amazon and ebay, but that’s it. I was about to finally throw out these empty panes, until I realized how much I liked them, even without their stamps.