- Title Pages
- Organisms and Environments
- Part one Relationships, Relationships
- Chapter 1 Bull to Bull and Cow to Bull
- Chapter 2 Cow to Cow
- Chapter 3 Cow to Calf
- Part Two The Machinery of a Bison’s Life
- Chapter 4 Bison Athletics
- Chapter 5 Digestion
- Chapter 6 Temperature Control
- Part Three Whence they Came Forth, and how Much they Multiplied
- Chapter 7 Ancestors and Relatives
- Chapter 8 How Many?
- Part Four The Bison’s Neighborhood
- Chapter 9 The Central Grassland
- PART FIVE The Bison’s Neighbors
- Chapter 10 Wolves and Bison
- Chapter 11 Buffalo Birds
- Chapter 12 Diseases and Parasites
- Chapter 13 Pronghorn
- Chapter 14 Prairie Dogs
- Chapter 15 Badgers
- Chapter 16 Coyotes
- Chapter 17 Grizzlies
- Chapter 18 Ferrets
- Part Six Human and Buffalo
- Chapter 19 Close Encounters of the Buffalo Kind
- Chapter 20 To Kill a Bison
- Chapter 21 Bison Numbers before the Great Slaughter
- Chapter 22 Where have all the Bison Gone?
- Chapter 23 Attitudes
- Chapter 24 Conservation
- Chapter 25 A Great Plains Park
- (p.53) Chapter 6 Temperature Control
- American Bison
Dale F. Lott
- University of California Press
Bison seldom if ever die of heat, but they often die of cold. The dark coat that makes the sun a nuisance in summer may be a lifesaver in winter. Bison evolved in really terrible winters; and even now, especially severe winters kill many of the old and the young. Every calorie of heat absorbed from the sun is a calorie the bison does not have to manufacture from the scarce forage. Bison cut their energy output by losing their appetite. They eat less and produce less heat — and not just because food is scarcer in winter. There's more to hair than color; it also offers insulation. Bison wallow in the summer, especially during the middle of the day. Wallowing puts soil into and onto their coat.
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