The inner bird: anatomy and evolution

1. bird beneath the feathers

2. bird is an animal with hollow bones

3. bird is like a dinosaur

4. bird is not so like a dinosaur

5. kinds of birds

6. That bird is different from the other one

7. Feathers and feathered dinosaurs

8. Birds with a modern shape

9. Birds on land

10. Birds at sea

App. 1. Birds in relation to other vertebrate animals

App. 2. Geological time scale.