A study predicts the resilience of migratory birds to environmental change by modeling optimal migration strategies for five shorebird species in the East Asian-Australasian Flyway. The model considers past (1960s), present (2010s), and future (2060s) environmental conditions and compares predictions with empirical tracking data. Larger species, with fewer stopover sites, require significant changes in migration routes and strategies to adapt to habitat loss and climate change, while smaller species can buffer habitat loss by redistributing stopover areas. The study highlights that larger species have historically followed more optimal migration routes but are now more vulnerable due to habitat deterioration. Smaller species, however, have shown more flexibility in adjusting their migration strategies. The model provides a framework for conservation planning, helping to identify necessary adaptations for migratory species under future environmental conditions. The research underscores the importance of understanding how environmental changes affect migration strategies and the need for targeted conservation efforts to ensure the survival of migratory birds. The study also emphasizes the role of body size in determining migration strategies and the challenges faced by species with limited adaptive capacity. The findings contribute to the broader understanding of how global environmental changes impact biodiversity and the resilience of migratory species.A study predicts the resilience of migratory birds to environmental change by modeling optimal migration strategies for five shorebird species in the East Asian-Australasian Flyway. The model considers past (1960s), present (2010s), and future (2060s) environmental conditions and compares predictions with empirical tracking data. Larger species, with fewer stopover sites, require significant changes in migration routes and strategies to adapt to habitat loss and climate change, while smaller species can buffer habitat loss by redistributing stopover areas. The study highlights that larger species have historically followed more optimal migration routes but are now more vulnerable due to habitat deterioration. Smaller species, however, have shown more flexibility in adjusting their migration strategies. The model provides a framework for conservation planning, helping to identify necessary adaptations for migratory species under future environmental conditions. The research underscores the importance of understanding how environmental changes affect migration strategies and the need for targeted conservation efforts to ensure the survival of migratory birds. The study also emphasizes the role of body size in determining migration strategies and the challenges faced by species with limited adaptive capacity. The findings contribute to the broader understanding of how global environmental changes impact biodiversity and the resilience of migratory species.