Spanish transhumant herders (IMAGE) Hun-Ren Ökológiai Kutatóközpont Caption The continuity of trashumance (seasonal migration between ecological regions) depends partly on its related traditional ecological knowledge, which is linked to the maintenance of trashumance of foot. This practice is threatened by restrictions and impediments to mobility as well as legal disadvantages of long-distance mobility between different governing entities in Spain. Credit Photo by Berta Martín-López Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.