2.7. Estimation of the daily rate of prey delivery in the nests
We estimated the daily rate of delivery for each type of prey item between 16 and 34 days old. We did not consider prey consumed by nestlings older than 35 days because nestlings can move to the branches (Roberts et al . 1999, Purroy and Purroy 2016) and may consume some prey outside the nest. To minimise bias in the estimates, we only considered nests with at least five complete days of data available.