Wildways Illustrated
I've always admired these lovely "hand crafted" interpretive signs in the parks and now I know where they come from - If you haven't seen them in a park near you - ask for them! 
  WILDWAYS illustrated is a full service interpretive design firm specializing in vivid watercolor illustrations of wildlife and landscapes. Our interpretive signs, exhibits, and displays appear in visitor centers, at overlooks, and along trails in federal, state, and county parks and preserves.
 www.wildwaysillustrated.com