predictor variable | 95% CI for upper bound slope | 95% CI for all points slope | two-tailed p-value for upper bound interaction |
---|---|---|---|

heart index | (−32.3, −19.1) | (−18.1, −12.1) | p = 0.018 |

relative flight muscle size | (−1.78, −0.07) | (−1.33, −0.70) | p = 0.78 |

body mass | (0.04, 0.21) | (0.15, 0.20) | p = 0.24 |

hand-wing index | (−0.0095, −0.0049) | (−0.0028, −0.00090) | p = 0.003 |

wing loading | (−10.26, 19.96) | (20.42, 33.71) | p = 0.86 |