Climatic niche variation in genetically distinct populations throughout the annual cycle for a migratory parulid bird, Cardellina pusilla.

Abstract excerpt

At the intraspecific level, environmental heterogeneity can create opportunities for local adaptation and population differentiation. However, studying the effects of environmental heterogeneity in migratory animals is challenging due to the complexity of their natural history, which is conditioned by their long journeys each year. Cardellina pusilla is a widespread Neotropical migratory bird that comprises six...

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