It's a nice, kinda elegant study. I'm not convinced by the results that a 'map' sense need be involved, could be a 'how far did I go' sense that provides a goo

It's a nice, kinda elegant study. I'm not convinced by the results that a 'map' sense need be involved, could be a 'how far did I go' sense that provides a good enough proxy. I'd need to see movement path analysis to be convinced. The one individual's in the supplementary figure suggests migration to the foraging grounds was higher speed and linear, which would allow for a decent mental model of total displacement. The return trip appears to be more meandering/tortuous, as if foraging is occurring after the turnaround point, which would provide some buffer to increase either linearity or speed if/when necessary to 'stay on schedule'.