Fig. 3. Latency to beg in the three age groups. Latency was measured as the time it took for nestlings to beg after the start of tapping. N=10, 13, 6 for the control and 12, 13, 9 for the corticosterone (CORT)-treated groups D1–3, 4–6, and 7–9, respectively (D, days post-hatching). ^*P<0.05.