animation with dispersal constraints (IMAGE) University of Southern California Caption Animation made using MegaSDM, which shows species range changes with dispersal constraints for Franklin’s Ground Squirrel from 2010 to 2070. “With the more biologically accurate dispersal-constrained animation, you can see (in blue) that the species range does not expand through time nearly as much as with the dispersal-unconstrained animation,” said Shipley. Animation/Ben Shipley. Credit Animation/Ben Shipley. Usage Restrictions none 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.