Exploring intraspecific variation in migratory destinations to investigate the drivers of migration

Anne-Sophie Bonnet-Lebrun, Marius Somveille, Ana S.L. Rodrigues & Andrea Manica
Various benefits (e.g. tracking of resources and of climate niche) and costs (e.g. distance travelled) are hypothesized to drive seasonal animal migrations. Until now, these potential factors have been investigated together at the species level, but migratory movements are made at the individual level, leading to intraspecific variability. Here, we use ringing/recovery data from 1308 individuals belonging to thirteen North American bird species to analyse patterns in intraspecific variability of migratory destinations in order to...
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