The diagram illustrates the process in the natural cycle of a frog.
In general, the process involves four main stages: the eggs grow into adult frogs, which can lay eggs. It takes a long time to finish, especially in the final step when the frog almost changes its habitat.
In the first step, frog’s eggs are laid in the water surface in places that have still and shallow water like ponds or lakes and protected by the jelly-like coating. This step takes about 6 to 21 days. After this time, eggs hatch into tadpoles which have a fish-like tail to move like a fish and eat algae and small plants. The total time of this is approximately 6 to 9 weeks, with around 3 to 6 weeks being time for the development of tadpole’s legs: from just having tail to having rear legs and finally having all 4 legs.
The process continues with tadpoles growing into froglets. After having bigger, longer legs and lungs, they now can jump and stay on water. The subsequent stage begins after approximately 12 weeks when the adult frogs appear without a tail. They are able to leave the water and live in a mixed environment: small bodies of water and grass, forest area and their diets are changed into eating insects and small animals. They live in that state around 2 to 4 years, during which time they can lay eggs and this cycle continue