How This Supercolony of 1.5 Million Penguins Stayed Hidden for Nearly 3,000 Years
https://www.livescience.com/64282-hidden-adelie-penguin-supercolony.html
[In 2018] scientists announced an incredible discovery by looking at poop stains in satellite images — 1.5 million Adélie penguins were living & thriving on a little patch in Antarctica surrounded by treacherous sea ice called the Danger Islands.