Bernd Heinrich is Professor Emeritus of Biology at the University of Vermont. He has written several memoirs of his life in science and nature, including One Man’s Owl, Ravens in Winter, and A Year in the Maine Woods, which won the 1995 Rutstrum Authors’ Award for Literary Excellence.

• * Preface [to the 2004 Edition] * Introduction *1. The Colony Cyclev *2. Economy of the Colony *3. The Flight Machine and Its Temperature *4. Warming Up *5. Heating the Nest *6. The Heat Transfer System *7. Juggling Costs and Benefits *8. Commuting and Foraging Movements *9. Foraging Optimization by Individual Initiative *10. Competition between Species *11. Pollination and Energetics *12. Ecology and Coevolution * Summary * Appendix A: How to Rear Bumblebees * Appendix B: The Bumblebees of North America * References * Index

This is a remarkable and rewarding book, complementary to, yet in some respects going far beyond, its predecessors. It is highly recommended.

Bernd Heinrich is Professor Emeritus of Biology at the University of Vermont. He has written several memoirs of his life in science and nature, including One Man’s Owl, Ravens in Winter, and A Year in the Maine Woods, which won the 1995 Rutstrum Authors’ Award for Literary Excellence.

• * Preface [to the 2004 Edition] * Introduction *1. The Colony Cyclev *2. Economy of the Colony *3. The Flight Machine and Its Temperature *4. Warming Up *5. Heating the Nest *6. The Heat Transfer System *7. Juggling Costs and Benefits *8. Commuting and Foraging Movements *9. Foraging Optimization by Individual Initiative *10. Competition between Species *11. Pollination and Energetics *12. Ecology and Coevolution * Summary * Appendix A: How to Rear Bumblebees * Appendix B: The Bumblebees of North America * References * Index

This is a remarkable and rewarding book, complementary to, yet in some respects going far beyond, its predecessors. It is highly recommended.

Bernd Heinrich is Professor Emeritus of Biology at the University of Vermont. He has written several memoirs of his life in science and nature, including One Man’s Owl, Ravens in Winter, and A Year in the Maine Woods, which won the 1995 Rutstrum Authors’ Award for Literary Excellence.

• * Preface [to the 2004 Edition] * Introduction *1. The Colony Cyclev *2. Economy of the Colony *3. The Flight Machine and Its Temperature *4. Warming Up *5. Heating the Nest *6. The Heat Transfer System *7. Juggling Costs and Benefits *8. Commuting and Foraging Movements *9. Foraging Optimization by Individual Initiative *10. Competition between Species *11. Pollination and Energetics *12. Ecology and Coevolution * Summary * Appendix A: How to Rear Bumblebees * Appendix B: The Bumblebees of North America * References * Index

This is a remarkable and rewarding book, complementary to, yet in some respects going far beyond, its predecessors. It is highly recommended.