Table 1 Distance ratios in relation to the shortest great circle distance for simulated trajectories based on different compass mechanisms in three examples of songbird migration systems (shown in Fig. 3)
From: Feasibility of sun and magnetic compass mechanisms in avian long-distance migration
| Â | Breeding location | Wintering location | Distance of great circle route (km) | Autumn + Spring | Autumn | Spring | ||||
|---|---|---|---|---|---|---|---|---|---|---|
Rhumbline route | Fixed (menotactic) magnetic compass route | Magnetoclinic compass route | Time-comp. sunset compass route | Fixed (menotactic) sunset compass route | Time-comp. sunset compass route | Fixed (menotactic) sunset compass route | ||||
Northern wheatear | 70° N, 54° W | 15° N, 15° W | 6672 | 1.01 | 1.00 | 1.01 | 1.00 | 1.09 | 1.01 | 1.07 |
Willow warbler | 68° N, 20° E | 10° S, 30° E | 8710 | 1.00 | 1.00 | 1.00 | 1.00 | 1.04 | 1.06 | 1.04 |
Pied flycatcher | 68° N, 20° E | 10° N, 10° W | 6814 | 1.01 | 1.00 | 1.02 | 1.00 | 1.00 | 1.00 | 1.01 |