First Northward Migration of Juveniles in 2022 that Became Orphaned during Midwinter, Compared to Juveniles with No Indication of Altered Family Status (IMAGE)
Caption
First northward migration of juveniles in 2022 that became orphaned during midwinter (red, n = 10) compared to juveniles with no indication of altered family status (reference group; blue, n = 14). a) migration tracks; b) migratory progress, measured as the distance (km) from the Ouse Washes in the United Kingdom (the location farthest from the breeding grounds reached by any of the birds); dashed transect lines in a indicate 1,000 km progress intervals for comparison. Circles indicate final track locations for individuals that subsequently died in the northern part of the range (four orphans and two from reference group); crosses indicate recorded deaths (two orphans). c) date of crossing 12.5°E, used as a proxy for migration departure. Boxes indicate the inter quartile range (IQR), with the central line depicting the median and the whiskers extending to 1.5*IQR. Fig. created using RStudio (R Core Team 2023) and Inkscape.
Credit
Hans Linssen, University of Amsterdam (Fig. created using RStudio (R Core Team 2023) and Inkscape)
Usage Restrictions
Free to use in the context op this study
License
Original content