Examples of oviparous animals

Birds

• Birds are exclusively oviparous animals as all birds lay eggs as a form of reproduction.
• Chicken is among the most recognizable oviparous animals that lay hard-shelled eggs containing an embryo sac.
• Most birds fertilize internally and thus lay fertilized eggs that later develop to form the young one. However, some birds might also lay unfertilized eggs.
• Birds lay eggs in their nest and look after the eggs until they hatch, some birds like hen and ducks might even sit on the eggs to keep them warm.
• Many of the young birds are precocial, meaning they are able to walk and feed immediately upon hatching.
• However, some birds look after their young ones for some time after hatching by providing food and protection.

Reptiles

• Reptiles are similar to birds in the method of developing their young ones.
• Reptilian eggs, however, are soft and often leathery to touch. The shell is usually thin and colorful.
• Fertilization may be internal or external depending on the species.
• They lay eggs on land and mostly bury the eggs in the sand to provide warmth.
• The temperature during the development of the embryo is critical in the case of reptiles as it determines the sex of the young ones.
• Thus, most reptiles try to keep the eggs at a stable temperature over a long period of time.
• The size, texture, and color of the eggs in reptiles is also dependent on the species.
• Parental care after hatching is seen in most reptiles where they teach the young ones to look for food and to protect themselves.