ArticleNature ecology & evolution2026
Avian migration timing advances linked to season-dependent population benefits.
Article in Nature ecology & evolution, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
6 authors.
Funding
Abstract
While migratory species can adjust their migration timing in response to climate change, it remains unclear whether these shifts can insulate them from population decline. Here we compiled a global database pairing 4,351 population-level estimates of migration timing across 549 avian species with corresponding population trends and rates of climate change at breeding and non-breeding grounds, coupled with a full-annual-cycle theoretical model. Building on evidence for an accelerating advancement in bird migration over the past century (cumulatively advanced 13.86 days from 1970 to 2019), we show that rapidly advancing migration is beneficial for bird abundance during pre-breeding migration but detrimental during post-breeding migration. The net demographic benefit depends on pre-breeding advancement outpacing that during post-breeding migration. This benefit is more pronounced in large-bodied species. Our findings highlight that population benefits of rapidly shifted migratory behaviour are season dependent, underscoring the importance of full-annual-cycle perspectives for understanding and conserving migratory species under global change.
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Registered trials
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