The child already knows birds that live in your area: saw them while walking, watching them from the window. But the world of birds is incredibly rich. Introduce your baby to books with different birds, read and tell about their features: about where they build their nests and hatch as juveniles, on long flights, about their favourite food and habits. After that, browse through books about birds, let the kid calls them and tells all that is remembered. As you gradually add new facts to the already known.