ArticleMovement ecology2022
Differences in on-ground and aloft conditions explain seasonally different migration paths in Demoiselle crane.
Article in Movement ecology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed.
- Migration patterns and hybridization within the Asian stonechat complex in response to a major geographical barrier.Evolution letters · 2026Article
- Efficient curve fitting with penalized B-splines for oceanographic and ecological applications.Scientific reports · 2025Article
- Detour migration to circumvent the Himalayas in the Montagu's Harrier Circus pygargus.Movement ecology · 2025Article
- Migratory birds modulate niche tradeoffs in rhythm with seasons and life history.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Seasonal migration patterns of Siberian Rubythroat (Calliope calliope) facing the Qinghai-Tibet Plateau.Movement ecology · 2024Article
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Abstract
backgroundAlthough some migratory birds may take different routes during their outbound and inbound migration, the factors causing these differential migrations to and from the breeding grounds, have rarely been investigated. In Northeast Asia, Demoiselle crane (Anthropoides virgo) performs one of the most extreme "loop" migrations known to date. During outbound migration, they cross the Himalayas to non-breeding sites in northwest India. Contrastingly, during inbound migration to the breeding grounds, they fly around the western end of the Himalayas. We hypothesise that differences in prevailing environmental conditions aloft and/or on-ground during both seasonal migrations are at the core of this phenomenon.
methodsBased on the tracking data of 16 individuals of tagged Demoiselle crane, we compared conditions during actual migration with those of simulated "reverse" migration (i.e. by adding 180 degrees to the flight direction and adding and subtracting half a year to the timestamps of outbound and inbound migration, respectively).
resultsThe comparison of actual and simulated "reverse" migration indicated that cranes would have encountered poorer aloft (wind support and thermal uplift) and on-ground conditions (temperature) if they had migrated in a reverse outbound migration and poorer on-ground conditions (Normalised Difference Vegetation Indexes [NDVI]) if they had migrated in a reverse inbound direction.
conclusionsOur analyses suggest that both on-ground and aloft conditions play a key role in explaining Demoiselle cranes' loop migration, during the periods that they chose to use these alternative routes. Knowledge on the determinants of (differential) migration routes allow predicting migration decisions and may be critical in mitigating global change effects on animal migrations.
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