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No apparent gain from continuing migration for more than 3000 kilometres : willow warblers breeding in Denmark winter across the entire northern Savannah as revealed by geolocators

Lerche-Jørgensen, Mathilde; Willemoes, Mikkel LU ; Tøttrup, Anders P; Snell, Katherine Rachel Scotchburn and Thorup, Kasper (2017) In Movement Ecology 5. p.17-17
Abstract

BACKGROUND: For most Afro-Palearctic migrants, particularly small songbirds, spatiotemporal migration schedules and migratory connectivity remain poorly understood. We mapped migration from breeding through winter of one of the smallest Afro-Palearctic migrants, the willow warbler Phylloscopus trochilus, using geolocators (n = 15).

RESULTS: Birds migrated from North European breeding grounds to West Africa via the Iberian Peninsula following a narrow corridor along the West Coast of Africa. Birds then dispersed across the northern Savannah with termination of migration highly variable among individuals. The termination of migration appeared not to be related to timing, current and previous years' vegetation conditions or... (More)

BACKGROUND: For most Afro-Palearctic migrants, particularly small songbirds, spatiotemporal migration schedules and migratory connectivity remain poorly understood. We mapped migration from breeding through winter of one of the smallest Afro-Palearctic migrants, the willow warbler Phylloscopus trochilus, using geolocators (n = 15).

RESULTS: Birds migrated from North European breeding grounds to West Africa via the Iberian Peninsula following a narrow corridor along the West Coast of Africa. Birds then dispersed across the northern Savannah with termination of migration highly variable among individuals. The termination of migration appeared not to be related to timing, current and previous years' vegetation conditions or biometrics. During winter, most birds moved southwards to improved vegetation.

CONCLUSION: The willow warblers showed a large, unexpected longitudinal spread in winter sites of more than 3000 km between individuals breeding within a 500 m range resulting in a low degree of connectivity. The large wintering area may well be related to generalist behaviour in the species. Our findings contribute to understanding the link between breeding and wintering ecology in long-distance migratory birds.

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author
publishing date
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publication status
published
subject
keywords
Journal Article
in
Movement Ecology
volume
5
pages
17 - 17
publisher
BioMed Central
ISSN
2051-3933
DOI
10.1186/s40462-017-0109-x
language
English
LU publication?
no
id
5d23ea73-385b-496e-b010-25e82bc30c63
date added to LUP
2017-09-08 13:54:47
date last changed
2017-09-15 15:34:03
@article{5d23ea73-385b-496e-b010-25e82bc30c63,
  abstract     = {<p>BACKGROUND: For most Afro-Palearctic migrants, particularly small songbirds, spatiotemporal migration schedules and migratory connectivity remain poorly understood. We mapped migration from breeding through winter of one of the smallest Afro-Palearctic migrants, the willow warbler Phylloscopus trochilus, using geolocators (n = 15).</p><p>RESULTS: Birds migrated from North European breeding grounds to West Africa via the Iberian Peninsula following a narrow corridor along the West Coast of Africa. Birds then dispersed across the northern Savannah with termination of migration highly variable among individuals. The termination of migration appeared not to be related to timing, current and previous years' vegetation conditions or biometrics. During winter, most birds moved southwards to improved vegetation.</p><p>CONCLUSION: The willow warblers showed a large, unexpected longitudinal spread in winter sites of more than 3000 km between individuals breeding within a 500 m range resulting in a low degree of connectivity. The large wintering area may well be related to generalist behaviour in the species. Our findings contribute to understanding the link between breeding and wintering ecology in long-distance migratory birds.</p>},
  author       = {Lerche-Jørgensen, Mathilde and Willemoes, Mikkel and Tøttrup, Anders P and Snell, Katherine Rachel Scotchburn and Thorup, Kasper},
  issn         = {2051-3933},
  keyword      = {Journal Article},
  language     = {eng},
  pages        = {17--17},
  publisher    = {BioMed Central},
  series       = {Movement Ecology},
  title        = {No apparent gain from continuing migration for more than 3000 kilometres : willow warblers breeding in Denmark winter across the entire northern Savannah as revealed by geolocators},
  url          = {http://dx.doi.org/10.1186/s40462-017-0109-x},
  volume       = {5},
  year         = {2017},
}