Animals

• Cold blooded vs Warm blooded animals

• Aestivation vs Hibernation

• Diapause vs Hibernation

• Butterfly vs Moth

• Male Moth vs Female Moth

• Butterfly  vs Caterpillar

• Cartilaginous vs Bony fishes

• Polyp vs Medusae

• Larva and Pupa of Mosquito

• Male vs Female Cockroach

• Anopheles vs Culex

• Spider vs Insect

• Frogs vs Toads

• Snake vs Lizard

• Chordata vs Non Chordata

• Centipedes vs Millipedes

• Crocodile vs Alligator

• Turtle vs Tortoise.

• Oviparous vs Viviparous animals

• Oviparity vs Viviparity vs Ovo-viviparity

• Old world Monkeys vs New World Monkeys

• Ammonotelism vs Ureotelism vs Uricotelism