Hibernation                                                                                       Aestivation

1.

Hibernation is a state of reduced activity in some organisms to escape cold winter conditions.

1

Aestivation is a state of reduced activity in some organisms to escape desiccation due to heat in summers.

2

. Bears and squirrels inhabiting cold regions are examples of animals that hibernate during winters.

2

Fishes and snails are example of organisms aestivating during summers.

                  Ectotherms                                                                                   Endotherms

1

Ectotherms are cold blooded animals. Their temperature varies with their surrounding.

1

Endotherms are warm blooded animals. They maintain a constant body temperature.

2

Fishes, amphibians, and reptiles are ectothermal animals.

2

Birds and mammals are endothermal animls.