Why the number of single male Magellanic penguins is rising at this breeding colony

Female Magellanic penguins are more likely to die at sea as juveniles, which has caused a skewed sex ratio of nearly three adult males to every female, as well as population decline of more than 40 percent since 1987 at one of their largest breeding colonies -- Punta Tombo in Argentina.

from Latest Science News -- ScienceDaily http://bit.ly/2AsTf2V