Replication Data for: "Individual variation in migration and wintering patterns of long-tailed ducks Clangula hyemalis from a population in decline."

- The table "migration.characteristics.LTD.xlsx" contains the information on the breeding status, the timings of life stages (wintering, migration etc.) and locations of stages for every year - The table "LTD_GeoLight.xlsx" contains all calculated locations from the geolocators using the GeoLight method - The table "LTD_probGLS.xlsx" contains all calculated locations from the geolocators using the probGLS method - The table "GLS deploy + ringing table.xlsx" contains the information about the biometrics of the birds during catching and the identifier and deploy and recover dates of the geolocators - The ".lux"-files contain the original readout of the light data of the geolocators including its metadata in the header.

For geolocators whose internal clock was still running at the time of retrieval, an additional lux file with the ending “_driftadj” is available, correcting for the internal time drift of the geolocator, resulting in more accurate timings. The name of the file corresponds to the identifier of the geolocator. Note that some geolocators were deployed multiple times. - The ".deg"-files contain the original readout of other environmental sensors of the geolocators including its metadata in the header.