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<p>The Bluethroat <i>Luscinia svecica</i> is a Palearctic passerine comprising several subspecies with distinct migratory strategies. While the movements of <i>L. s. svecica</i>, <i>L. s. cyanecula</i> and <i>L. s. azuricollis</i> are partially known from geolocator and ringing data, the French Atlantic coast endemic <i>L. s. namnetum</i> has never been tracked. To address this gap, we equipped 31 males with light-level loggers in 2016 and 2017 and 20 males with multi-sensor loggers in 2024 in the core range of the taxon (Charente-Maritime, France). Five birds were recaptured the following springs, providing the first full annual cycle tracking for this subspecies. The four birds tagged with light-level loggers broadly wintered in Western Iberian coastal regions. The individual tagged with a multi-sensor logger migrated from its breeding site to southwestern Spain in seven flights, leaving in late August, staging for one month at approx. 950&#xa0;m a.s.l. in central Spain, and wintered in Andalucía. Spring migration was faster and more direct, with three nocturnal flights in early March. All flights occurred at night and reached altitudes up to 4430&#xa0;m a.s.l.&#xa0;above terrestrial grounds. These results confirm <i>L. s. namnetum</i> as a short-distance migrant strongly relying on specific Iberian habitats (South and Western wetlands but also central middle elevation massifs) which therefore hold a strong importance for the conservation of this range-restricted taxon.</p>

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Tracking the range restricted white-spotted Bluethroat Luscinia svecica namnetum using multi-sensor and light-level loggers

  • 期刊论文

  • 发表日期：

    2026年3月13日

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  • Paul Doniol-Valcroze,
  • Sophie de Grissac,
  • Raphaël Musseau,
  • Fanny Rey,
  • Pierrick Bocher,
  • Kasper Thorup,
  • Frédéric Jiguet

摘要

The Bluethroat Luscinia svecica is a Palearctic passerine comprising several subspecies with distinct migratory strategies. While the movements of L. s. svecica, L. s. cyanecula and L. s. azuricollis are partially known from geolocator and ringing data, the French Atlantic coast endemic L. s. namnetum has never been tracked. To address this gap, we equipped 31 males with light-level loggers in 2016 and 2017 and 20 males with multi-sensor loggers in 2024 in the core range of the taxon (Charente-Maritime, France). Five birds were recaptured the following springs, providing the first full annual cycle tracking for this subspecies. The four birds tagged with light-level loggers broadly wintered in Western Iberian coastal regions. The individual tagged with a multi-sensor logger migrated from its breeding site to southwestern Spain in seven flights, leaving in late August, staging for one month at approx. 950 m a.s.l. in central Spain, and wintered in Andalucía. Spring migration was faster and more direct, with three nocturnal flights in early March. All flights occurred at night and reached altitudes up to 4430 m a.s.l. above terrestrial grounds. These results confirm L. s. namnetum as a short-distance migrant strongly relying on specific Iberian habitats (South and Western wetlands but also central middle elevation massifs) which therefore hold a strong importance for the conservation of this range-restricted taxon.