NATURE’S GIFT TO HUMANITY, just out in 2015 by author and photographer Mary Rensberry, has a different take on the use of prose and ordinary pigeon poop. She’s known as the first Pooptologist in the ranks, at least under that name.
Here’s a sample from one of her pages in Nature’s Gift to Humanity:
Mary Rensberry, Author, Master Pooptologist and Photographer
Also found at: maryrensberry.wordpress.com