A frog is an amphibian. They lay their eggs in water. The eggs hatch into a tadpole which lives in water until it various metamorphoses into an adult frog.Tadpoles look more like fish than frogs, they have long finned tails and breathe through gills.An amphibian can live both on land and in water.Although frogs live on land, their habitat must be near swamps, ponds or in a damp place. This is because they will die if their skin dries out.Instead of drinking water, frogs soak it into their body through their skin.Frogs breathe through their nostrils while also absorbing about half the air they need through their skin.Frogs use their sticky, muscular tongue to catch and swallow food. Unlike humans, their tongue is not attached to the back of its mouth. Instead it is attached to the front, enabling the frog to stick its tongue out much further.The common pond frog is ready to breed when it is only three years old.Frogs in the wild face many dangers and are lucky to survive several years. In captivity however, frogs can live for much longer. Frogs can see forwards, sideways and upwards all at the same time. They never close their eyes, even when they sleep.Remarkably, the frogs actually use their eyes to help them swallow food. When the frog blinks, its eyeballs are pushed downwards creating a bulge in the roof of its mouth. This bulge squeezes the food inside the frog's mouth down the back of its throat.
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