Figure 5.
Effects of HVC temperature on song bouts. A, Number of syllables within a song bout with respect to changes in HVC temperature. Shaded area is SEM The black trace uses the full number of syllables; the red trace excludes syllable repetitions. Both trends are significantly positive in aggregation. B, Normalized transition entropy of the ending syllables versus HVC temperature change. Each gray line is from one bird. Red dashed line is the fitted linear model of the population. The slope is significantly smaller than 0 (p = 6.6 × 10−6, LMM). C, Intersong intervals versus HVC temperature change. Each gray line is from one bird. Red dashed line is the fitted linear model of the population. The slope is mildly negative (p = 0.04, LMM).