To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 1 Examples of trials. Shows movement initiation and obstacle navigation for two different bait objects, one of moderate mass and one very heavy. Effects of load mass and size on cooperative transport in ants over multiple transport challenges Helen F. McCreery, Jenna Bilek, Radhika Nagpal, and Michael D. Breed Journal of Experimental Biology 2019. 222:None-None; doi: 10.1242/jeb.206821 Download Original Video