examples of birds 
There are more than 9,000 species of birds scattered around the world.
Land-based bird that flies with difficulty.
Widespread insectivore that pecks at the bark of trees to find food and to nest.
Swift long-billed bird found in Eurasia; it feeds mainly on shellfish.
Strong-billed scavenger with usually black plumage; it sometimes damages crops.
Mainly insectivorous bird found in the wetlands and marshes of Eurasia and Africa; it has a tuft of upright feathers on its head.