Ectothermy vs. Endothermy
lEndothermy
ÜCan regulate body temperature which allows them to live in colder environments
ÜCan sustain a high metabolic rate even at low temperature if food is available
ÜRequires more energy than other similar sized ectotherm.
ÜTo stay cool, lose heat through evaporation (i.e.,  sweating, or panting).