Monopolisering van voedsel door eerstgeboren, weldoorvoede jonge Buizerds Buteo buteo vergroot kans op sterfte onder nestgenoten

First-born nestlings of Common Buzzard dominate their siblings, first during facultative siblicide in the first 4-7 days of life (irrespective of food availability), then by domination during feeding and finally -when already fully fed- by monopolizing fresh prey items by lying on top of these, thus depriving siblings from access. The latter strategy is probably typical in years with a small and unpredictable food supply. Molestations and deprivation of food induce poor growth and weaken competitive abilities of younger siblings, thus speeding up their mortality in years of poor food supply.