Machme

Machme is an oxbow of the Aare river in Klingnau, in the Swiss canton of Aargau. Sources describe it as the last large Aare oxbow in the whole canton. It is a nature reserve set within one of the most valuable bird habitats in northern Switzerland.

What is the Machme?

An oxbow is a former river arm that has been cut off from the main current and become a calm, shallow body of water. The Machme is about 500 metres long and belongs to the Auenschutzpark Aargau, a network of sites that protect dynamic river-floodplain landscapes. It lies at roughly 47.590° N, 8.236° E, close to the Klingnauer Stausee reservoir.

Why does it matter for wildlife?

The Machme serves as a resting place and wintering habitat for waterbirds. Still water, weak current and shallow zones suit birds looking for food and shelter during migration and through the cold months. For birdwatchers it is one of the more interesting corners of the lower Aare valley.

How did the surrounding landscape form?

The Klingnau reservoir came into being with the construction of the Klingnau hydropower plant, built between 1931 and 1935. Embankments were raised and the Aare was dammed by 6.1 metres. Wide shallows formed and over time became an important bird habitat. In 1990 the reservoir was designated a Ramsar wetland, recognised as internationally important for migratory waterbirds and waders that rest and feed here.

Protection and restoration

The reservoir and its surroundings are protected by a cantonal decree from 1988, which divides the area into nature protection, landscape protection, power plant, forest and water zones. Work around the Machme has included dredging the 500-metre oxbow so that it does not silt up and become overgrown. In total, the floodplain park covers about 117 hectares around the reservoir.

Tips before you go

• The site is protected, so keep noise down and stay on marked paths.
• The best time for waterbirds is the migration season and winter, when most species gather on the water.
• Bring binoculars; birds are often far from the shore.
• Keep dogs on a lead or leave them at home to avoid disturbing wildlife.

Frequently asked questions

Where is the Machme? In Klingnau, canton Aargau, in the lower Aare valley next to the Klingnauer Stausee reservoir.

What is an oxbow? A former river arm separated from the main channel, forming a calm body of water.

How long is the Machme? About 500 metres.

Is it a protected area? Yes. It is a nature reserve within the Auenschutzpark Aargau, and the neighbouring reservoir is a Ramsar site.

Why visit? For quiet, waterside views and birdwatching, especially during migration and in winter.