Researchers Prepare Baboon GPS Collars (IMAGE) Smithsonian Tropical Research Institute Caption Project leader Margaret Crofoot (right) and researcher Roland Kays (left), both research associates at the Smithsonian Tropical Research Institute, prepare GPS collars for their study subjects. The collars are custom-designed to weigh less than 5 percent of an olive baboon's body weight, record positional data once per second for at least two weeks and automatically detach at the end of the study. Credit Courtesy of Rob Nelson Usage Restrictions Credit Rob Nelson 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.