This just made me simile. But there is more to the story. A group of penguins on land is called a waddle. Cute. A group of young penguins on land is a creche. And the more famous of the usage of that word, right, the display of the nativity, or a creche. So, clearly these are young penguins - see the spectacled keeper towering over them, and they are on land at Christmas. How perfect.