Metamorphasis

When frogs are born, they aren't exactly frogs. They begin their lives as these little guys called tadpoles! They've got tails, which disappear as they progress through life. When the tadpole stage is completed - little limbs have begun to form - the tadpoles become froglets. Tadpoles lose about a quarter of their weight during this transformation. At 10 to 13 weeks, shortly before the froglet leaves the water in which they have developed, their tail has completely disappeared through the process of apoptosis and their forelegs emerge. This is when the lungs have developed and they lose their gills. After this stage, the froglets become adult frogs and live happily ever after eating bugs and such!