Six années de suivi satellitaire des migrations pré et post nuptiales d'une Cigogne noire Ciconia nigra

The six years of satellite monitoring of the Black Stork Anthéa provided unprecedented data on the migration trajectories of the same individual. This preliminary study highlighted differences

in spring and autumn migratory trajectories in Africa and Europe. The results show that the total migration duration does not differ significantly between seasons, but prenuptial migration is longer and slower than postnuptial migration. The average daily speed in postnuptial migration is higher, probably due to the influence of the prevailing winds. Latitude influences speed, with a decrease north of 30°N, linked to more powerful thermal updrafts in Africa. The distances traveled in Africa present distinctive characteristics linked to the scarcity of resources, influencing the daily speed. Migratory stopovers are more frequent and last longer during prenuptial migration, probably to meet increased energetic needs.

Anthéa showed, during these 6 years of monitoring, fidelity to wintering and breeding sites, although routes and stopovers vary between spring and autumn migrations due to meteorological factors and competition for resources in Africa. This study highlights the crucial importance of continuing research on the Black Stork to better understand its ecological needs. The information collected can guide habitat management, identify essential migratory corridors and encourage international cooperation to protect this endangered species. This knowledge is essential to ensure the long-term survival of the Black Stork and preserve the richness of our natural heritage