Shifts in avian migration phenologies do not compensate for changes to conditions en route in spring and fall.

ABSTRACT: Several factors are known to affect bird migration timing, but no study has simultaneously compared the effects of temperature, land surface phenology, vegetation greenness, and relative humidity in both spring and fall. In addition, it is unclear whether long-term shifts in migration phenologies have kept pace with changing climates. For example, if migration shifts earlier in the spring, temperatures on migration dates may remain stable over time despite spring warming trends. If the phenologies of birds, plants, and insects shift asynchronously in response to changing climates, then birds may encounter reduced resource availability during migration. We estimated spring and fall 10%, 50%, and 90% cumulative migratory passage dates at 53 weather surveillance radar stations across the US C

SUBMITTER: Adams CA 

PROVIDER: S-EPMC12086353 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature