Males (2) Growth (2) Females (2) Feathers (2) Barn owl (2) Growth (2) corps (2) temps (durée) (1) comportement (1) parasite (1) plomb (1) animal (1) variation génétique (1) environnement (1) ADN (1) couleur (1) taux (1) jeune (1) Color (1) Environmental conditions (1) Reproduction (1) Variation (1) Selection (1) Drama (1) Environmental conditions (1) Animal feeding (1) White-throated sparrow (1) White (1) Time (1) Testosterone (1)