Summary
Every year, billions of birds undertake seasonal migrations, traveling vast distances across North America. These movements require physical adaptations and reflect fine-tuned responses to ecological signals such as resource availability and optimal timing for reproduction. Avian migration has substantial implications for human well-being, including ecosystem service provision, impacts on food security, and the potential to spread pathogens. However, despite the relevance of large-scale seasonal avian movement, relatively few studies have explicitly sought to understand how changes in migrator