On this map, we show the GPS tracks of 25 baboons from a troop of 46 near the Mpala Research Centre in Kenya over a four-week period. From these meandering loops, we can see where they foraged. We can see the wide berth they gave villagers. We can see where they slept and how they found a new group of ‘sleeping trees’ for a few nights while a leopard was on the prowl.
Collective animal behaviour has long vexed scientists, mainly because they had no means to track it in the wild. In this study, anthropologist Margaret Crofoot found a way.