Scientists have stumbled across a huge group of previously unknown Adélie penguins on the most northerly point of the Antarctic Peninsula.
Numbering more than 1.5 million birds, they were first noticed when great patches of their poo, or guano, showed up in pictures taken from space.
The animals are crammed on to a rocky archipelago called the Danger Islands.
The researchers, who detail the discovery in the journal Scientific Reports, say it is a total surprise.
“It’s a classic case of finding something where no-one really looked! The Danger Islands are hard to reach, so people didn’t really try that hard,” team-member Dr Tom Hart from Oxford University, UK, told BBC News.
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