There have been some alarming claims about wind farms contributing to large numbers of bird deaths. Most of these can be traced to a single wind farm built in the United States around 30 years ago that was poorly sited in the flight path of migratory birds. In Australia, planning conditions require extensive research on local bird life before and after construction, and as a result, bird deaths are rare.
In Victoria, a study of the population of the Brolga in south-west Victoria found declining numbers were the result of loss and degradation of habitat and predation of foxes, not wind farms in the region26. Compared to bird deaths from collisions with buildings, electricity lines, cars, pesticides, communication towers and cats, the effect of wind farms on birdlife is small.