Cloud Rats (IMAGE) Field Museum Caption Cloud rats like these are just some of the 93 percent of Luzon land mammals that are found nowhere else in the world. The cloud rats in this image were drawn with colored pencil by The Field Museum's scientific illustrator Velizar Simeonovski. Credit Velizar Simeonovski, The Field Museum Usage Restrictions Please include credit: Velizar Simeonovski, The Field Museum License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.