It's unclear just how close these captives came to getting out, or if they had tried escaping before, but it wouldn't have been the first time a penguin succeeded in escaping confinement.
In 2012, a penguin managed to slip out of his enclosure at an aquarium in Japan, after which he took up residence in Tokyo Bay. Despite having been born in captivity, the feathered escapee was able to thrive on his own in the world beyond his cage. By the time he was found and captured months later, the penguins keepers couldn't help but remark on how happy and healthy he had been outside the aquarium.
Read more: 10 Of The Greatest Zoo Animal Escapes