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Table 1 Descriptive values (mean ± SD) for Vinous-throated and Ashy-throated parrotbills obtained in this study

From: Comparison of head size and bite force in two sister species of parrotbills

  Vinous-throated Parrotbill Ashy-throated Parrotbill
Guizhou Jiangxi Hebei Guizhou
Head size (cm3) 2.06 ± 0.19 1.65 ± 0.22 1.62 ± 0.12 1.57 ± 0.15
Maximal bite force (N) 9.49 ± 2.91 11.94 ± 3.53 14.24 ± 4.80 9.58 ± 3.36
Body mass (g) 9.45 ± 0.70 8.86 ± 0.54 9.07 ± 0.68 8.94 ± 0.71
Bill size (mm2, grasp index) 50.37 ± 3.98 43.79 ± 5.34 43.03 ± 4.75 43.03 ± 4.75
Sample size 25 24 21 24