Wing area (roughly) scales by n² and mass by n³, so size matters for this kind of thing. See https://en.wikipedia.org/wiki/On_Being_the_Right_Size https://en.w

Wing area (roughly) scales by n² and mass by n³, so size matters for this kind of thing. See https://en.wikipedia.org/wiki/On_Being_the_Right_Size https://en.wikipedia.org/wiki/On_Being_the_Right_Size (PDF at https://www.phys.ufl.edu/courses/phy3221/spring10/HaldaneRightSize.pdf https://www.phys.ufl.edu/courses/phy3221/spring10/HaldaneRig...)