From: Directional compass preference for landing in water birds
Country | Magnetic declination | Number of flocks | Mean vector (mN) mμ | Mean vector (gN) gμ | ∣Delta (mN, mμ)∣ | ∣Delta (gN, gμ)∣ |
---|---|---|---|---|---|---|
Botswana I | -8° | 264 | 356°/176° | 344°/164° | 4° | 12° |
Botswana II | -15° | 85 | 0°/180° | 345°/165° | 0° | 15° |
Canada | 17° | 136 | 354°/174° | 11°/191° | 6° | 11° |
Czech Rep. | 3° | 1,095 | 7°/187° | 10°/190° | 7° | 10° |
Estonia | 7° | 168 | 14°/194° | 21°/201° | 14° | 21° |
Finland | 8° | 218 | 9°/189° | 17°/197° | 9° | 17° |
Italy | 3° | 394 | 9°/189° | 12°/192° | 9° | 12° |
Poland | 4° | 381 | 13°/193° | 17°/197° | 13° | 17° |