Table 1 Seasonal differences in stopover use among populations. We report the total, mean, and standard error of the number of stopovers used by each population and during each migration season. As stopover use is expected to vary as a function of migration distance, we report the mean and standard error of migration distance per stopover used
From: Inclement weather forces stopovers and prevents migratory progress for obligate soaring migrants
Season | Population | Individuals | Total number of migrations | Total number of stopovers | Number of stopovers per migration (mean ± se) | Migration distance (km, mean ± se) |
|---|---|---|---|---|---|---|
Spring | Southwest USA | 14 | 39 | 44 | 1.1 ± 0.2 | 2690 ± 163.6 |
Central Canada | 6 | 19 | 128 | 6.7 ± 0.7 | 1409 ± 297.2 | |
Western Canada | 6 | 11 | 32 | 2.9 ± 0.4 | 1371 ± 220.3 | |
Southern South America | 4 | 11 | 22 | 2.0 ± 0.5 | 1735 ± 232.3 | |
Fall | Southwest USA | 14 | 45 | 102 | 2.3 ± 0.3 | 1996 ± 171.9 |
Central Canada | 8 | 23 | 188 | 8.2 ± 0.9 | 960 ± 105.7 | |
Western Canada | 6 | 11 | 22 | 2.0 ± 0.6 | 2187 ± 283.9 | |
Southern South America | 5 | 15 | 51 | 3.4 ± 0.7 | 1382 ± 212.8 |