Rapid updating of ecological information in wild Guinea baboons

Knowing where to find what kind of food, and when, is essential for survival and reproduction. Studying animals' foraging strategies thus provides insights into the cognitive processes underlying real-world problem solving. We investigated whether free-ranging Guinea baboons (Papio papio) keep track of the spatio-temporal availability of a preferred food resource, the Natal orange (Strychnos spinosa). An exceptional wildfire that destroyed most ripe fruits in 2019 provided a quasi-experimental opportunity to assess whether Guinea baboons flexibly adjusted their space use to an unexpected change in resource availability or instead continued to follow habitual routines. The animals' space use patterns shifted significantly following the wildfire. After one single visit, they stopped going to the area during the period when Natal oranges would normally be available. In the following year, when Natal oranges were available again, the baboons resumed regular space use patterns. We also assessed travel linearity, speed, and departure time from sleeping sites towards the target area with and without ripe fruit. Guinea baboons travelled more linearly, 14% faster, and ca. 40 min earlier toward the target area when S. spinosa was in season than when it was not. In conclusion, Guinea baboons rapidly adjusted their space use patterns in response to changes in the availability of a high-value food resource. These results underscore their capacity for flexible, reward-sensitive decision-making and goal-directed foraging.