Crayfish once populated the streams of the Sihlwald, but today they are no longer found there. Functioning ecosystems are crucial for biodiversity and adaptation to climate change. Crayfish are part of this. Studies have now shown that some streams in the Sihlwald offer optimal living conditions for crayfish.
The project
Wildnispark Zurich is planning to reintroduce crayfish to the Sihlwald in collaboration with «Lebensgemeinschaft Wasser Schweiz». In addition, interactive exhibition elements are planned in the aquarium on the grounds of the Visitor Centre. These are intended to inform children and adults about the native aquatic inhabitants and raise their awareness of their protection.
The Förderverein Wildnispark Zurich is exclusively supporting this project. Various member events are planned as part of the project.
Donation information
Your donation is tax-deductible. Your donation will go to the Förderverein Wildnispark Zurich, which will use the money exclusively for this project.
Donation account: IBAN CH18 0900 0000 8724 8863 2
Thank you for your support
Every contribution counts towards restoring the natural habitat of the native crayfish in the Sihlwald and preserving biodiversity. Thank you!
50'000 Swiss francs
- Reintroduction of crayfish in the Tommenrainbach in the Sihlwald forest
- Promotion of biodiversity
- Raising awareness among visitors and the general public
- 2024: Authorisations and planning, first reintroduction of crayfish and public relations work, concept for educational elements
- 2025: Realisation of educational elements
- 2025–2027: Reintroduction in stages
- 2028: Performance review
Authorisation cantonal Office for Nature Conservation is available.
«Chräbs im Chräbsächerli»
The Förderverein of the Wildnispark Zurich are bringing the crayfish back to the Sihlwald.
Crayfish play an important role in the water ecosystem as «nature's cleaning agents» and are to be reintroduced to the Sihlwald.
