New Zealand's forests were once rich in bird life, but introduced predators have taken a terrible toll - including extinctions of some species. Pūkaha Mount Bruce is one of a number of sanctuaries aiming to eliminate predators and protect native wildlife. It was once part of Seventy Mile Bush, a stretch of dense forest that was settled (and largely cleared) by Scandinavians in the 1870s. Archival audio sourced from Radio New Zealand Sound Archives, http://www.soundarchives.co.nz/. Sound files may not be reused without permission from Radio New Zealand Sound Archives (Reference number T7700).