 |
Avifauna 1950
A good knowledge of the historical distribution and abundance is an important basis for assessing the current status of birds in
... |
 |
Assessing the conversation status of birds in Switzerland
What is the situation of birds in Switzerland? To answer this question, it is necessary to pull together and interpret the results of the
... |
 |
Non-native birds in Switzerland
The establishment of non-native plant and animal species has been recognised as a major conservation problem. International agreements,
... |
