Elephant Dominance (IMAGE) University of California - Berkeley Caption A family of elephants leaves a river in Samburu National Reserve upon the arrival of a more dominant elephant family. Monsoon, the matriarch (third from the right in foreground) in the more dominant family, is equipped with a GPS radio collar, allowing researchers to track her movements. Credit Photo by George Wittemyer, UC Berkeley Usage Restrictions Must include photo credit. 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.