Sci-Five | The Hindu Science Quiz: On Frogs

The world’s largest frog is the goliath frog of West Africa—it can grow to 15 inches and weigh up to 7 pounds.

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Frogs were the first land animals with vocal cords. Male frogs have vocal sacs—pouches of skin that fill with air. These balloons resonate sounds like a megaphone, and some frog sounds can be heard from a mile away.

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At 7mm (0.27 inches) long, Paedophryne amauensis, endemic to eastern Papua New Guinea is not only the smallest frog but also may be the world’s smallest vertebrate.

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Many poisonous frogs, such as the golden poison frog and dyeing poison frog, are boldly coloured to warn predators of their dangerous toxic skins. 

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The wood frog can live north of the Arctic Circle, surviving for weeks with 65% of its body frozen. This frog uses glucose in its blood as a kind of antifreeze that concentrates in its vital organs, protecting them from damage while the rest of the body freezes solid.

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