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Disrupted seasonal biology impacts health, food security, and ecosystems: a call for integrated researchClocks for the city: circadian differences between forest and city songbirdsEffects of temperature on circadian clock and chronotype: an experimental study in a passerine birdIntegrating the avian annual cyclePhenology, seasonal timing and circannual rhythms: towards a unified frameworkWhen the sun never sets: Diverse activity rhythms under continuous daylight in free-living arctic-breeding birdsHeritable circadian period length in a wild bird populationA framework for the study of genetic variation in migratory behaviour