Which mammals are not social animals?

If animals that give birth are called mammals then what are animals which lay eggs are called?

• Answer:

  Actually, not all animals that lay eggs are mammals, and not all mammals give live birth. Some snakes have livebirth(reptile), and the platapus(mammal), lays eggs. But, to answer your question, animal that lay eggs are called reptiles, amphibeans, fish, and birds.