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Radar data

This page displays live radar observations above the visitors centre of the Swiss Ornithological Institute in Sempach. Radar monitors all types of flights (migratory and non-migratory). For more information on radar monitoring see

Today’s migration

Flights over the Swiss Ornithological Institute in Sempach during the last hours, as measured by the radar at 50 m above ground and higher. With rain, the radar can't produce useful measurements. However, under such conditions there are no or nearly no birds migrating.

Migratory rates per day and night

Standardised flight intensity per day (yellow) and night (blue) measured above Sempach.

Flight direction per month
Day time number of bird per sector

Monthly distribution of flight directions at day (yellow) and at night (blue) measured above Sempach.

Biolovision Sàrl (Switzerland), 2003-2020