Data from: Faster migration in autumn than in spring: seasonal migration patterns and non-breeding distribution of Icelandic Whimbrels Numenius phaeopus islandicus ...

• Main Authors: Carneiro, Camilo, Gunnarsson, Tómas G., Alves, José A.
• Format: Dataset
• Language: English
• Published: Dryad 2019
• Subjects: migration duration; migration speed; geolocator; Numenius phaeopus
• Online Access: https://dx.doi.org/10.5061/dryad.3kf35s5; https://datadryad.org/stash/dataset/doi:10.5061/dryad.3kf35s5

Migration is fundamental in the life of many birds and entails significant energetic and time investments. Given the importance of arrival time in the breeding area and the relatively short period available to reproduce (particularly at high latitudes), it is expected that birds reduce spring migration duration to a greater extent than autumn migration, assuming that pressure to arrive into the wintering area might be relaxed. This has previously been shown for several avian groups, but recent evidence from four tracked Icelandic Whimbrels (Numenius phaeopus islandicus), a long distance migratory wader, suggests that this subspecies tends to migrate faster in autumn than in spring. Here, we (1) investigate differences in seasonal migration duration, migration speed and ground speed of Whimbrels using 56 migrations from 19 individuals tracked with geolocators and (2) map the migration routes, wintering and stopover areas for this population. Tracking methods only provide temporal information on the migration ... : raw_positionsTime stamps from the light data defined by the threshold method and derived locations for each bird. We appreciate that anyone interested in using these data contacts the authors.temp_cond_wetsTemperature, conductivity and wet data for each individual. We appreciate that anyone interested in using these data contacts the authors. ...