Geographic variation in beak colouration in gentoo penguins Pygoscelis papua

Ornamental colouration is often due to carot-enoid pigments and varies inter- and intra-specifically. This paper reports on variation in beak colour of the gentoo penguin, Pygoscelis papua, corresponding to different geographical locations along a latitudinal gradient in the Antarctic Peninsula (from King George Island (62815 0 S– 58837 0 W) to Ronge´Island (64840 0 S–62840 […]