Penguins are a diverse group of creatures, ranging from the smallest, the blue penguin, to the largest, the Emperor penguin, which stands at 1.1m tall.

They are adapted to a water-based lifestyle, with some species reaching underwater speeds of up to 36 kilometers-per-hour, and are the fastest swimming birds in the world.

Two species of penguins, the Emperor penguin and the Adélie penguin, live year-round in Antarctica.