In Switzerland there are hardly any rivers left where engineering was not applied to control its flow. As a result the rivers have all been more or less tamed. This has had a great impact on nature too. Where there used to be a variety of fish, insects, birds and frogs many have meanwhile gone forever.
The government now invests quite a lot of money to keep nature reserves where the disappearing wildlife can survive. The picture shows a pond where a couple of rare frog species are given a new space to survive.
The second picture shows a kind of bucket with a net for the frogs to be able to leave. A plug will occasionally get pulled out to allow the bucket to go completely dry to simulate a natural river.
This location is not made known to the public so that tourists are kept out out for fear of them causing damage to the fragile eco system.
