Frog Life Cycle

The Amazing Transformation: Metamorphosis

Frogs go through an incredible change called metamorphosis. The word 'meta' means change, and 'morphosis' means form. This means a frog completely changes its body and how it lives as it grows. A frog's life cycle is like being a totally different animal twice—first, a swimming plant-eater, then a hopping bug-eater!

Stage 1: Egg

It all begins when a female frog lays hundreds of jelly-covered eggs in water. These eggs stick together in a clump called frogspawn. The eggs must stay wet or they will dry out and not survive.

Stage 2: Tadpole

After about a week, the eggs hatch into tadpoles. Tadpoles look like tiny fish. They have a long tail and gills to breathe under water. At this stage, they eat plants and algae.

Stage 3: Tadpole with Legs

Between 9 and 12 weeks, the tadpole changes more. First, back legs appear, then front legs grow. The tail starts to shrink, and the tadpole’s lungs develop so it can begin breathing air.

Stage 4: Froglet

By 12-16 weeks, the tadpole is now a froglet. Its legs are fully formed, the tail is almost gone, and it can leave the water for short times. The froglet breathes with lungs and through its skin.

Stage 5: Adult Frog

When the tail is completely absorbed, the frog becomes an adult frog. It can live on land and in water, catching insects for food. Its skin must stay moist to help it breathe.

Adaptations and Timeline

Frogs change from breathing with gills to lungs. Their tail is absorbed and used for energy. They also switch from eating plants to eating insects. Most frogs take about 12-16 weeks to grow from eggs to adults, but this can vary by species and temperature.

Why Water Is Important

Water is needed at every stage. Eggs need to stay wet, tadpoles need water to breathe, and even adult frogs need moist skin to survive.

Interesting Fact: Some frog parents carry their babies on their backs, and a few frog species skip the tadpole stage altogether!