The gentoo penguin was formerly a single species, Pygoscelis papua, with a circum-Antarctic distribution. Previously, a few subspecies were named on the basis of slight morphological differences between populations inhabiting different places (they live not only on the Antarctic peninsula, but also on the South Shetland and Falkland Islands, South Georgia, and other places). They’re … Continue reading New paper claims that gentoo penguins are now four species, not one