Biology and art join almost as one, in this example of graffiti on the shell of a living, city-dwelling snail. It appears in the blog Inner City Snail. (Thanks to investigator Norma Inman for bringing it to our attention.)
BONUS: The artist, named Slinkachu, has a blog called “Little People“, filled with artificially (thus the “art”) composed, beautiful tiny street scenes filmed on naturally composed, full-size streets.