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Table 1 Axial headings of landing in 14 species of birds

From: Directional compass preference for landing in water birds

Species n mμ (axial) Circular SD r p
Alopochen aegyptiacus 189 175°/355° 28° 0.631 < 0.01
Anas penelope 91 7°/187° 16° 0.858 < 0.01
Anas platyrhynchos 2431 9°/189° 30° 0.575 < 0.01
Anser anser 16 6°/186° 29° 0.605 0.50 > p > 0.10
Aythya ferina 155 8°/188° 31° 0.558 < 0.01
Cygnus olor 15 3°/183° 28° 0.616 < 0.01
Dendrocygna viduata 30 4°/184° 28° 0.625 < 0.01
Larus canus 107 6°/186° 14° 0.885 < 0.01
Larus ridibundus 119 19°/199° 44° 0.301 < 0.01
Mergellus albellus 33 3°/183° 22° 0.735 < 0.01
Mergus merganser 22 5°/185° 17° 0.846 < 0.01
Nettapus auritus 14 176°/356° 23° 0.723 < 0.01
Vanellus armatus 31 177°/357° 29° 0.608 < 0.01
Vanellus coronatus 85 179°/359° 27° 0.643 < 0.01
  1. n refers to the number of recordings (flocks), mμ: mean vector with respect to magnetic North, r: vector length, p: probability value of Rayleigh statistics.