Figure 5
From: Testing two competing hypotheses for Eurasian jays’ caching for the future
Top view of the experimental set-up of Experiment 2. Birds could access the three test compartments (A, B, C) from a middle compartment. On each experience trial (Left), the birds had access only to one test compartment (e.g., A in Trial n; B in Trial n+1), and they were presented either with a bowl containing powdered food (F, Trial n, Trial n+2) or with an empty bowl containing no food (N, Trial n+1, Trial n+3). The compartment that was accessible and food availability rotated on a 3-day cycle and on a 2-day cycle, respectively. On the test trial (Right), a bowl containing food items (i.e., not food in powdered form) was placed in the middle compartment and caching trays were placed in all test compartment. Birds could freely move and cache in all compartments.
