Table 1.
Properties and positional summary data of the 14 birds. % Lead, percentage of the time the bird was in the foremost position in the direction of flight of the core group; % in core area, percentage of time a bird was found in the core area of the flock defined as the area around the centre of gravity of the flock that contained 50% of the birds with the smallest inter-individual distances; MDC, median distance to the centre of gravity of the core area of the flock in metres; 98 k, 98 000 (due to two birds departing from the flock); % trail, percentage of time a bird was following another bird in its wake area; % front, percentage of time a bird had another bird following in its wake area; GF, guided flight; IF, independent flight (unaccompanied phase of leg 4).
| birds | Pi | Ed | Fl | Pe | Li | No | Am | To | So | Bl | Vi | Te | Ar | Au |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| nest ID | 1 | 4 | 3 | 3 | 1 | 4 | 2 | 4 | 3 | 3 | 1 | 4 | 2 | 2 |
| sex | M | F | F | F | M | M | M | M | F | F | F | F | F | F |
| mass: start (g) | 1519 | 1341 | 1413 | 1345 | 1509 | 1387 | 1445 | 1415 | 1301 | 1359 | 1403 | 1255 | 1259 | 1405 |
| mass: finish (g) | 1332 | 1140 | 1220 | 1164 | 1334 | 1228 | 1268 | 1224 | 1184 | 1170 | 1184 | 1102 | 1086 | 1174 |
| GF % lead | 3.3 | 4.6 | 0.7 | 2.9 | 3.0 | 6.8 | 2.7 | 41.1 | 1.1 | 18.0 | 4.3 | 3.0 | 5.8 | 2.6 |
| IF % lead | 4.9 | 4.5 | 8.7 | 3.1 | 11.2 | 9.5 | 5.9 | 15.6 | 0.1 | 15.0 | 7.8 | 8.5 | 0.4 | 4.9 |
| GF %: core area | 45 | 54 | 32 | 51 | 53 | 54 | 64 | 47 | 43 | 31 | 51 | 64 | 54 | 57 |
| IF %: core area | 52 | 58 | 62 | 49 | 65 | 60 | 59 | 44 | 1 | 51 | 64 | 70 | 1 | 65 |
| GF MDC | 4.2 | 3.5 | 3.5 | 3.8 | 3.6 | 3.5 | 2.9 | 3.9 | 4.5 | 5.2 | 3.8 | 2.9 | 3.4 | 3.4 |
| IF MDC | 4.6 | 4.2 | 3.8 | 5.0 | 3.7 | 3.9 | 4.0 | 5.2 | 98 k | 4.7 | 3.8 | 3.3 | 98 k | 3.6 |
| GF % front | 6.4 | 4.8 | 6.0 | 6.0 | 6.0 | 4.7 | 6.6 | 1.6 | 5.9 | 1.3 | 7.1 | 6.8 | 5.2 | 4.2 |
| GF % trail | 5.1 | 5.7 | 3.5 | 6.2 | 4.8 | 6.6 | 6.0 | 5.5 | 3.7 | 2.0 | 5.4 | 7.9 | 5.8 | 3.6 |
| IF % front | 3.9 | 4.9 | 4.9 | 4.8 | 4.4 | 4.2 | 4.3 | 2.4 | 2.2 | 1.6 | 4.6 | 6.1 | 1.3 | 4.0 |
| IF % trail | 3.6 | 3.8 | 4.4 | 2.6 | 4.6 | 4.9 | 4.0 | 3.9 | 1.2 | 2.4 | 5.8 | 6.1 | 2.2 | 3.5 |