Fig. 2
From: Patterns of object play behaviour and its functional implications in free-flying common ravens
Duration of object play bouts for different play types (non-social or social) across age class (0–1: juveniles, 1–2: sub-adults year 1, 2–3: sub-adults year 2, 3+: adults). Here, we do not show the model outputs as the estimates associated with these predictors were not stable (Supplementary Fig. S5).
