Österreichischer Alpenverein Austrian Alpine Club, largest mountaineering club in Austria (in German). BirdLife Österreich BirdLife is the largest organization for ornithology and the protection of birds in Austria. Naturfreunde Österreich Austrian nature lovers association (in German). Naturschutzbund Österreich Advocate for nature (in German. Transitforum Austria-Tirol Association for the protection of environment and nature against the negative effects of through traffic (in German).