Abstract：
:Every year, billions of wild diurnal songbirds migrate at night. To do so, they shift their daily rhythm from diurnality to nocturnality. In captivity this is observed as a gradual transition of daytime activity developing into nocturnal activity, but how wild birds prepare their daily rhythms for migration remains largely unknown. Using an automated radio-telemetry system, we compared activity patterns of free-living migrant and resident European blackbirds (Turdus merula) in a partially migratory population during the pre-migratory season. We found that activity patterns between migrant and resident birds did not differ during day and night. Migrants did not change their daily rhythm in a progressive manner as has been observed in captivity, but instead abruptly became active during the night of departure. The rapid shift in rhythmicity might be more common across migratory songbird species, but may not have been observed before in wild animals due to a lack of technology.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Zúñiga D,Falconer J,Fudickar AM,Jensen W,Schmidt A,Wikelski M,Partecke Jdoi
10.1038/srep34207subject
Has Abstractpub_date
2016-09-26 00:00:00pages
34207issn
2045-2322pii
srep34207journal_volume
6pub_type
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