Crested penguins (genus Eudyptes) have a peculiar hatching pattern. with the first-laid egg (A-egg) hatching after the second-laid egg (B-egg) and chicks from A-eggs typically having a much lower survival probability. Maternal yolk androgens have been suggested to contribute to the competitive superiority of the B-chick in southern rockhopper penguins Eudyptes chrysocome. given their ... https://www.markbroyard.com/amazing-price-color-touch-7-97-medium-blonde-cendre-brown-online-now-mega-choice/