Table 1.

Mean morphological and kinematic values for Selasphorus hummingbirds in the Colorado Rocky Mountains

GenderElevationm (g)R (mm)n (Hz)Φ (degrees)WDL (g m-2)
S. platycercus
    Females18753.37556.39834.078146.4310.042
29003.59257.79037.669151.7420.041
    Males18753.33254.81637.181149.3480.043
29003.36054.35537.890151.9990.043
S. rufus
    Females18753.33145.23844.747144.9980.065
29003.80047.71147.623161.0850.060
    Males18753.40442.75454.066163.8930.066
29003.60142.49655.563167.5730.071
  • Stroke amplitude (Φ) and wingbeat frequency (n) were measured during free flight at each site

    Body mass (m), wing length (R), and Φ were used to calculate the wing disc loading, WDL

    Free-flight wingbeat kinematics were attained for S. platycercus females although these birds were not included in flight trials