1. Chapter 3 Opener

2. Figure 3.1 The current extent of tropical forests and the areas that have been cleared of tropical forests

3. Figure 3.2 Coral reefs are built up from the skeletons of billions of tiny individual animals

4. Figure 3.3 Species richness for vertebrates is greatest in tropical regions with abundant rainfall

5. Figure 3.4 Cone snails are an indicator group for marine biodiversity

6. Table 3.1 Number of native mammal species in selected tropical and temperate countries paired for comparable size

7. Figure 3.5 Approximately 1.5 million species have been identified and described by scientists; the majority of these are insects and plants

8. Figure 3.5 Approximately 1.5 million species have been identified and described by scientists; the majority of these are insects and plants (Part 1)

9. Figure 3.5 Approximately 1.5 million species have been identified and described by scientists; the majority of these are insects and plants (Part 2)

10. Figure 3.6 In addition to the 1.5 million species already described, scientists are describing about 16,000 new species each year

11. Figure 3.7 Researchers first encountered Laonastes aenigmamus being sold as a delicacy in Laotian food markets

12. Figure 3.8 Investigating the rainforest

13. Figure 3.8 An entomologist checks a suspended sheet containing fallen insects and leaves from a rainforest tree (Part 1)

14. Figure 3.8 A dirigible lowers its inflatable platform base into the dense Guiana rainforest canopy (Part 2)

15. Box 3.1 Conserving a world unknown: hydrothermal vents and oil plumes

16. Box 3.2 Humans as habitat: the incredible diversity of the human microbiome

17. Figure 3.9 Sampling, sorting, describing, and identifying insects taken from the tree canopy

18. Figure 3.9 Sampling, sorting, describing, and identifying insects taken from the tree canopy (Part 1)

19. Figure 3.9 Sampling, sorting, describing, and identifying insects taken from the tree canopy (Part 2)