The drawing is really an imprint, made by Sundara, an eight-year-old Asian elephant who fell asleep at the Chester Zoo in England, leaving an impression so detailed that it is possible to make out the folds in her ears and the ridges in her trunk. Sundara made the imprint during what must have been a deep, almost motionless slumber, something which is highly unusual for an elephant, which generally has to get up in the middle night to switch sides due to its weight, something which in this case contributed to the immaculate detail of the impression.