Breeding latitude predicts timing but not rate of spring migration in a widespread migratory bird in South America.

ABSTRACT: Identifying the processes that determine avian migratory strategies in different environmental contexts is imperative to understanding the constraints to survival and reproduction faced by migratory birds across the planet.We compared the spring migration strategies of Fork-tailed Flycatchers (Tyrannus s. savana) that breed at south-temperate latitudes (i.e., austral migrants) vs. tropical latitudes (i.e., intratropical migrants) in South America. We hypothesized that austral migrant flycatchers are more time-selected than intratropical migrants during spring migration. As such, we predicted that austral migrants, which migrate further than intratropical migrants, will migrate at a faster rate and that the rate of migration for austral migrants will be positively correlated with the

SUBMITTER: Jahn AE 

PROVIDER: S-EPMC6540664 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature