Switzerland's Skies Come Alive as Spring Bird Migration Begins

Spring migration is now underway in Switzerland, with the first short-distance migrants returning from their wintering grounds. Many species that spent the colder months in the Mediterranean have already arrived, while others are still making their way back from tropical Africa.

The Swiss Ornithological Institute has noted a clear increase in nocturnal bird activity in recent nights. Their migration radar detected more birds flying under cover of darkness, a key sign that the season has begun. Observers on the platform ornitho.ch have also reported a sharp rise in sightings of starlings and song thrushes.

Not all birds of the same species return at once. Males often arrive ahead of females to claim the best nesting spots. Meanwhile, some Nordic visitors, like smews and red-necked grebes, have lingered longer than usual due to the harsh winter further north.

Timing varies by species. Red kites typically reach Switzerland by late February, while little bitterns and sedge warblers are among the last, appearing around mid-May. The return of these birds follows an internal genetic clock, closely linked to changing daylight hours.

The arrival of early migrants marks the start of a busy breeding season. Some species will settle quickly, while others continue their journey north. For now, the skies over Switzerland are growing busier with each passing night.