comportement (1) aliment (1) famille (1) évolution (1) conflit (1) ordre (1) jeune (1) Context (1) Food (1) Selection (1) Animal feeding (1) Value (1) Parents (1) Order (1) Night (1) Hypothesis (1) Hunger (1) Food (1) Families (1) Evolution (1) Competition (1) Chance (1) Brothers and sisters (1) Begging (1) Barn owl (1) Back (1) Animals--Infancy (1) Ability (1) Animal clutches (1) Evolution (1)