temps (durée) (1) comportement (1) plomb (1) environnement (1) ADN (1) couleur (1) taux (1) jeune (1) Color (1) Selection (1) Drama (1) Animal feeding (1) White-throated sparrow (1) White (1) Time (1) Testosterone (1) Testis (1) Struggle (1) Prophecies (1) Probabilities (1) Paternity (1) Nature and nurture (1) Males (1) Lead (1) Investments (1) Hypothesis (1) Heterozygosity (1) Growth (1) Females (1) Feeds (1)