Mikkel Willemoes Kristensen

TL;DR: In this paper, the authors investigated the influence of different calibration methods on the accuracy of the latitudinal positions of geolocators, and demonstrated their effect on the measurement of day and night length, time of solar midnight ⁄ noon and the resulting position estimates using light measurements from stationary geolocalators at known places and from geocators mounted on birds.

TL;DR: It is demonstrated the existence of fundamentally different spatio-temporal migration strategies used by the birds during autumn and spring migration, and that songbirds may rely on distinct staging areas for completion of their annual cycle, suggesting more sophisticated endogenous control mechanisms than merely clock-and-compass guidance among terrestrial solitary migrants.

TL;DR: Year-round tracking of red-backed shrikes and thrush nightingales revealed that the cause of the delay was a prolongation of stopover time during spring migration at the Horn of Africa, which was affected by extreme drought.

TL;DR: The authors tracked the migration of a small Eurasian songbird, the Common Redstart, using archival light-level geolocators, showing a distinct counterclockwise loop migration from northern Europe.

TL;DR: It was found that individuals marked early in one year tended to be recaptured early in the same season in a following year indicating that individuals time their migration in spring or autumn similarly between years.