Data from: A red knot as a black swan: how a single bird shows navigational abilities during repeat crossings of the Greenland Icecap ...

• Main Authors: Kok, Eva M. A., Tibbitts, T. Lee, Douglas, David C., Howey, Paul W., Dekinga, Anne, Gnep, Benjamin, Piersma, Theunis
• Format: Dataset
• Language: English
• Published: Dryad 2020
• Subjects: Calidris canutus islandica; migrations; Greenland Icecap; Arctic; Greenland; Calidris canutus; Red Knot
• Online Access: https://dx.doi.org/10.5061/dryad.b8gtht795; https://datadryad.org/stash/dataset/doi:10.5061/dryad.b8gtht795

Despite the wealth of studies on seasonal movements of birds between southern nonbreeding locations and High Arctic breeding locations, the key mechanisms of navigation during these migrations remain elusive. A flight along the shortest possible route between pairs of points on a sphere (‘orthodrome’) requires a bird to be able to assess its current location in relation to its migration goal and to make continuous adjustment of heading to reach that goal. Alternatively, birds may navigate along a vector with a fixed orientation (‘loxodrome’) based on magnetic and/or celestial compass mechanisms. Compass navigation is considered especially challenging for summer migrations in Polar regions, as continuous daylight and complexity in the geomagnetic field may complicate the use of both celestial and magnetic compasses here. We examine the possible use of orientation mechanisms during migratory flights across the Greenland Icecap. Using a novel 2 g solar-powered satellite transmitter, we documented the flight ... : Read me Article: A red knot as a black swan: how a single bird shows navigational abilities during repeat crossings of the Greenland Icecap Journal: Journal of Avian Biology Article DOI: 10.1111/jav.02464 Authors: Eva M. A. Kok*, T. Lee Tibbitts, David C. Douglas, Paul W. Howey, Anne Dekinga, Benjamin Gnep & Theunis Piersma. *Corresponding author: E-mail: [e-mail], ORCID-ID: 0000-0002-3961-008X, ORCID-ID: Theunis Piersma: 0000-0001-9668-466X. 1. Raw tracking data: rekn13_totloc_r130d10lc1.txt All Argos data were filtered by the SAS version of the Douglas Argos Filter algorithm using the following parameter values: maxredun = 10 km, maxrate = 130 kph, and coef = 25. Locations that met the distance-angle-rate filter thresholds are labeled '1' in the weeddist column. 2. Identification of departure and arrival locations: lables JAB.csv See Material and Methods/Spatial analyses: Departure and arrival times and the intervening flights were determined from the visual inspection of the tracks (Google ...