The 2025 Osprey Project report has been published (in French only) in the March 2026 edition of the journal Nos Oiseaux. Three males from the Swiss reintroduction project returned to the Three-Lakes region in 2025. Arthur (photo above) came back to his Hagneck territory for the sixth year, although still didn’t manage to retain a passing female. On the other hand, Olympe and Racine each paired with an unringed immature female. Bringing fish to the female, nest-building and mating were observed in their territories during two months in the summer – very promising for 2026!

Concerning our females, Mouche and her partner successfully produced two young again in Moselle (France), and Chronos and her male Kepler bred again in Baden-Württemberg (Germany) but failed, possibly due to disturbance by a Pine Marten. Pistache, released at Bellechasse in 2018 but not seen again after she first left on migration, was discovered breeding with an unringed male in Marne (France), where the pair fledged two young.

Three new nest platforms were built in the Three-Lakes region, and two “Osprey Mornings” were held in June 2025. The next two are scheduled this year for Sunday, June 7 and 21. Observation points will be, as in previous years, in the Three-Lakes region, and in the Drugeon, Doubs and Aare River basins. Anyone who would like to contribute to our monitoring efforts for one or both of these dates can sign up here.

The full 2025 report can be downloaded here.