The research I've seen says bats are mostly affected by low frequency pressure waves from conventional turbines, so these won't have that problem.
They may also spin fast enough to make enough noise to scare birds away, but they are also moving pretty fast, so could pose a problem for birds at the low end of their loop, which is somewhat under 150 m.
Putting them on a migration route would be a very bad thing for birds.
They may also spin fast enough to make enough noise to scare birds away, but they are also moving pretty fast, so could pose a problem for birds at the low end of their loop, which is somewhat under 150 m.
Putting them on a migration route would be a very bad thing for birds.