Migration Evolves in Response to Distinct Regimes of Climate Seasonality in Tropical Versus Temperate-Breeding Suboscine Birds.

ABSTRACT: Avian migration has long captured human interest, but the causes of the evolution of migration remain unclear due to limited study of the full spectrum of migratory strategies, including short-distance and intratropical movements. We examine the climatic drivers of migration across the roughly 1300 species of suboscine birds, a group containing many intratropical migrants. Comparative analyses confirm that migratory behavior in temperate-breeding suboscines evolves in association with temperature seasonality. The evolution of migration in the tropics, however, has a more complex association with climatic variables including precipitation and greenness seasonality. Projections under future climate scenarios show that suboscines will experience average lower temperature seasonality, potentia

SUBMITTER: Johns EX 

PROVIDER: S-EPMC12240598 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature