Résumé
Several species of birds are expanding their breeding range in central Europe. Some of them have almost reached Switzerland. For new arrivals or former breeders to find a home here, it is critical that their habitats be sufficiently protected.
Projets
Monitoring des nicheurs et hôtes de passage rares
Chaque année, le monitoring des nicheurs et hôtes de passage rares traite plus de deux millions d...
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