I have seen a lot evidence that wind turbines kill a fair number of birds. Does the Vortex also kill birds?
Firstly wind mills and wind turbines are not a major killer of birds (no study exists at least). House cats, by contrast, are estimated to kill roughly one billion birds each year in the US alone. Statistically, a single house cat, a window pane, or an automobile is a much greater threat to birds than a wind mill. Anecdotal evidence indicates that birds occasionally collide with conventional three blade turbines as they do with any other large fast moving object (cars, airplanes etc). However, such events are rare and very unlikely to have any impact on bird populations. With regard to the Vortex, it always appears to be solid and should therefore cause fewer hits since it would look like it a solid object to a bird.
