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ROLLING THUNDER

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As August approaches, bison bulls begin to spar for the affection of females in the herd. The largest bulls battle first and begin "tending" females, leaving smaller bulls to breed later in the season with females who have yet to be claimed.
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Sandy Sisti
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Bison
As August approaches, bison bulls begin to spar for the affection of females in the herd.  The largest bulls battle first and begin "tending" females, leaving smaller bulls to breed later in the season with females who have yet to be claimed.