From: Directional compass preference for landing in water birds
Approach I | Approach II | Gearing | Touchdown | |
---|---|---|---|---|
Number of observations | 12 | 14 | 38 | 27 |
Mean vector (μ) | 118° | 117° | 115° | 114° |
Length of mean vector (r) | 0.991 | 0.993 | 0.994 | 0.995 |
Circular standard deviation | 8° | 7° | 6° | 5° |
Rayleigh test (p) | 2.54 × 10^{-11} | < 10^{12} | 7.9 × 10^{-7} | 1.67 × 10^{-6} |