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Detail of diet for B1013 from June 1 to October 1, 2001 using ≈1-mm hair segments. The diet estimate of C4 fraction uses C3 and C4 endmember mixing lines for both mesic (upper boundary) and xeric environments (lower boundary). These have average δ13C values of -28‰ and -12‰ for mesic environments and -26‰ and -13‰ for xeric environments, respectively. Average interval of time is 1.8 days (maximum, 2.4 days; minimum, 0.9 days).
