Go deeper into the history of each park with scholarly articles and essays from Oxford University Press, freely available for the centennial year.
Hiding in plain sightA study on camouflage and habitat selection in a slow-moving desert herbivore
In order to investigate how substrate composition influenced habitat preference and selection by juvenile desert tortoises (Gopherus agassizii), we completed a manipulative experiment in captivity and an observational study in the wild. In our captive experiment, we found that tortoises spent a greater portion of their time near rocks. We similarly found that wild tortoises preferentially placed themselves in areas with equivalent or larger-sized rocks.