Cold blooded vs Warm blooded animals 
OR
Ectotherms vs Endotherms / Poikilotherms vs Homeotherms
Cold blooded animals:  
 - Also known as ecotherms, poikilothermal animals.
 - They are unable to regulate their body temperature which changes with temperature of environment.
 - These animals show hibernation (winter sleep) and aestivation (summer sleep).
 - Examples: Fish, Ambipians (Frog), Reptilia ( Lizards)
 

Warm blooded animals:  
 - Also known as endotherms, homeothermal animals.
 - They maintain constant body temperature and will not change according to the temperature of the surroundings.
 - These two activities (Hibernation and aestivation) rarely occur in these animals.
 - Examples: Aves /Birds , Mammals