||Relatively variable body temperature.
||Relatively constant body temperature.
||They are oviparous.
||Thy may be oviparous or viviparous.
||Most of them have gills for respiration.
||They have lungs for respiration.
||They have 2 or 3 chambered heart except crocodile.
||They have four chambered heart.
||Their skin is covered with waterproof scales or are naked.
||Their skin is covered with either hair or feathers.
||They are called cold blooded animals.
||They are called warm blooded animals.
||Include class pisces, amphibia and reptilia.
||Include class aves and mammalia.
||Temperature of habitat or environment effect their body temperature.
||Temperature of habitat or environment has no effect on body temperature.
||They are also called ectotherms.
||They are also called endotherms.
||Examples: fish, frog, snake, etc.
||Examples: bird, cow, man, etc.
Image source: thebiologynotes
Differences between poikilothermic and homeothermic animals