To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 1. Sped-up time-lapse of a male Ambystoma maculatum tested within the active thermal gradient. Frames were taken every 30 s, for a total of 18 h of experiment (20 frames/sec). Ups and downs of fossorial life: migration restlessness and geotaxis may explain overwintering emergence in the spotted salamander Danilo Giacometti, Patrick D. Moldowan, and Glenn J. Tattersall Journal of Experimental Biology 2024. 227:None-None; doi: 10.1242/jeb.249319 Download Original Video