Chapters in this book

1. Frontmatter 1
2. Contents 5
3. Introduction 7
4. Observing Bumble Bees 17
5. Attracting Bumble Bees 20
6. Bumble Bee Forage Guide by Ecoregion 22
7. Maps and Seasonal Activity 29
8. Bumble Bee Decline and Conservation 31
9. Threats to Bumble Bees 33
10. Natural Enemies 35
11. Mimicry 38
12. Distinguishing Bumble Bees from Other Insects 42
13. Bumble Bee Names and Classification 45
14. How to Use This Book to Identify Bumble Bee Species 48
15. Species Accounts
16. Square- or long-cheeked bees with a rounded angle on the midleg 52
17. Short-cheeked bees with a rounded angle on the midleg 111
18. Medium- or long-cheeked bees with a sharp angle on the midleg 136
19. Hindleg (tibia) with the outer surface uniformly convex and densely hairy (cuckoo bumble bees, no workers) 155
20. Identification Keys to Female and Male Bumble Bees, with Photos 168
21. Glossary 199
22. Additional Resources 203
23. Acknowledgments 204
24. Photo Credits 206
25. Index 207