Bernhard Voelkl

Northern Bald Ibis

Reintroduction

Since 2004, the Waldrappteam has been guiding juvenile Northern Bald Ibises, hand-raised by human caregivers, from their breeding grounds north of the Alps to suitable wintering sites using ultralight aircraft. In addition to the migration route to the original wintering site at Laguna di Orbetello in Italy, a second route has been established since 2023, leading to the wintering site in Vejer de la Frontera in Spain. Once the birds arrive at the wintering sites, they are released into the wild in a careful stepwise reintroduction process. In the years to follow, they will independently return to their breeding sites, raise offspring and show them the migration route themselves.

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Research

The human guided migrations were from the start accompanied by research projects. For one, research is necessary to inform the conservation project for optimizing the reintroduction scheme. Additionally, the close contact with the birds prior and during migration and the continued remote monitoring offers exciting opportunities for many basic research questions. In two research projects we investigated how the birds coordinate and cooperate during formation flight in order to reduce the energy demands during long distance migrations. Fitting the birds with tiny high-precision data loggers, we could for the first time measure the actual energy savings acrued through flight in those characteristic V-shaped formations.

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Selected References