LRH: C. Sinkovics et al. RRH: Estimating the Size on Insect Prey . Obtaining accurate measurements of the size and volume of insects fed to nestlings from video-recordings Csenge Sinkovics 1,3 , Gábor Seress 2 , Virág Fábián 2 , Krisztina Sándor 2 , and András Liker 1,2 1 MTA-PE Evolutionary Ecology Research Group, University of Pannonia, P. O. Box 156, 8200 Veszprém, Hungary 2 Department of Limnology, University of Pannonia, P. O. Box 156, 8200 Veszprém, Hungary 3 Corresponding author. Email: csenge.sinkovics@gmail.com