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They have a black and white colouring is called counter-shading
Penguins have a lighter belly and a darker back, and helps them camouflage from predators above and below them
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They jump into the air before diving to swim faster
This move releases air bubbles from their feathers, cutting down on drag and doubling or tripling their speed underwater
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They don't have teeth
Instead, they have fleshy spines inside their mouths help them swallow fish
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They're waterproof
Penguins spread an oil produced by the preen gland that insulates their bodies and improves their hydrodynamics
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They are known to be social butterflies and are friendly with humans
Their main predators all reside in the water, so these birds feel much safer on land around researchers and tourists