4. Discussion
This study analysed the trophic strategy of an unusual forest insect-eating medium-sized raptor specialised in consuming social hymenopterans. We studied 4611 prey items obtained in 4 years in a total of 24 honey-buzzard´s nests. Our results suggest that the honey-buzzard´s diet is the adaptive result of the conflict between being an insect-eating median-sized migratory nidicolous raptor and collecting enough number of morsels for the growth of their nestlings, supporting the prey size and ingestion rate hypotheses.