Penguins were one of the noisiest neighbours Tom Crean and the other explorers had in Antarctica! Colonies of thousands of penguins made a constant chorus of trumpeting, braying, and squawking calls — especially Adelie penguins and Emperor penguins, both of which Tom would have encountered on his expeditions.
Did you know? Emperor penguin chicks make a different sound to their parents so that, even among thousands of birds, a parent can find its own chick just by listening for its call.
Explorers on early expeditions often wrote about how surprising the noise of a penguin colony was — some described it as sounding more like a farmyard than anything they expected to hear at the bottom of the world.
Try It Yourself Can you copy the trumpeting sound of an Emperor penguin? Try making a loud, honking "hoo-hoo" sound. Now imagine standing next to thousands of penguins all calling at once — how loud would that be?