1. The animals giving birth to their off springs are called Viviparous animals.
2. The animals which lay eggs are called Oviparous animals.
3. Viviparous animals have epidermal hair on their skin and external ears.
Examples are cow, elephant, dog, etc.
4. Oviparous animals do not have epidermal hair or external ears.
Examples are fish, frog, crow, peacock, snake, lizard etc.
