Frog comes under the class of amphibians as it can live both in water and on land. Usually it is found in water pits, ponds, moist grass and water drains. We can hear the croaking of frogs around these places during the monsoon. We can not see them from October to February. Let us study where they disappear in winter.
As the frog comes under the category of cold blooded animals therefore its body temperature does not remain stable, it changes according to the atmosphere. During winters as the temperature falls down, the body temperature of frog starts falling. Due to which, the rate of its physiological functions get lowered. It goes deep into the damp soil in order to live and it rests during winter season. This state of rest is called ‘hibernation’ or winter sleep. In this period, the functions of its body get slowed down as its eyes, mouth and nose remain closed. It respires through its wet skin as the nose stop functioning and it utilizes the glycogen and fats stored in its body in order to live during the period of hibernation. Frog becomes very weak in this period. In February as the temperature of surroundings starts’ raising it gets awake and comes out of the damp soil. In the month of May as the ponds dry up due to the quickly rising of temperature. Then frog again goes back to the damp soil in order to live alive. This state of rest in called aestivation or summer sleep. In the month of July as the rains start it comes out into the open.