Reddit mentions of To Whom It May Concern: An Investigation of the Art of Elephants

Check out this book if interested in more about this.

From the Publisher's Weekly review: "Prior to this book by Syracuse, N.Y., zookeeper Gucwa and Syracuse Post-Standard science editor Ehmann, no one had brought to the public's attention that elephants like to draw, and will, without training or reward, doodle spontaneously on the ground with a pebble or stick. In the case of Siri, a 13-year-old Asian elephant, her efforts were noted by Gucwa, her caretaker, who provided drawing materials and collected the results of her endeavors. Her drawings (50 of them are reproduced here) have been admired by artists such as Willem de Kooning and their significance discussed by evolutionists and cognitive researchers, some of whom affirm artistic intent of the drawings, while others attribute this activity to the animal's boredom. Interspersed with lore that demonstrates elephantine intelligence are relevant literary quotations. As de Kooning observes, "That's a damned talented elephant."