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Feasibility of sun and magnetic compass mechanisms in avian long-distance migration

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Figure

Fig. 1 Simulated migration routes based on different sun compass mechanisms.routes were calculated in daily steps of 200 km, with a new course for each step based on astronomical conditions at each daily departurelocation/time and assuming a constant geogr
Fig. 2 Simulated migration routes based on different magnetic compass mechanisms. a Fixed (menotactic) magnetic compass (red) and bmagnetoclinic compass orientation (orange)
Fig. 3 Simulated autumn and spring migration routes of three populations of songbirds
Table 1 Distance ratios in relation to the shortest great circle distance for simulated trajectories based on different compassmechanisms in three examples of songbird migration systems (shown in Fig
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