Windfarms and Birds

To: "Plimer, Andrew (Sen A. Hurley)" <>, "Birding Aus" <>
Subject: Windfarms and Birds
From: "Tim Murphy" <>
Date: Thu, 13 Apr 2006 15:37:05 +1000
Maybe a strobe light, linked to the blade speed, would make the blades more
visible to birds.  Also a pattern painted on the blades

A UV filter so that only UV got through, might make it invisible to humans
and, as birds are more UV sensitive, I think, still visible to the birds.

It shouldn't be too hard to research it.

Tim Murphy

-----Original Message-----
 Behalf Of Plimer, Andrew (Sen
A. Hurley)
Sent: Thursday, 13 April 2006 10:38 AM
To: Birding Aus
Subject: Windfarms and Birds

Although not peer reviewed, Hodos et al. (2001) found through laboratory
tests that motion smear, which makes the blade tips of wind turbines appear
transparent to birds at high speeds, occurs in American Kestrel's. This may
indicate that birds, no matter how fast and agile they may be, have trouble
picking up a fast moving turbine blade as they approach it. Others have
suggested that this motion smear effect may even be heightened in the field
due to backround grey/blue/green colours. Something to consider, perhaps.

Entire reference is;

Hodos, W., A. Potocki, T. Storm, and M. Gaffney. 2001. Reduction of motion
smear to
reduce avian collisions with wind turbines. Pages 88-105 in Proceedings of
the National
Avian-Wind Power Planning Meeting IV, Carmel. CALIF., May 16-17, 2000.
Prepared for
the Avian Subcommittee of the National Wind Coordinating Committee, by
Inc., Washington, D.C., Susan Savitt Schwartz, ed., 179p.


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