Prompted by the article in the Houston Chronicle, which related that
the 7000+ wind turbines in Altamont Pass have killed an
estimated 22,000 birds in 20 years, the news and discussion site
Slashdot ran a thread entitled
Wind turbines kill a few birds. The title pretty much sums up the
mood of the discussion, which is that turbines are not specifically
dangerous to birds - far more birds die flying into glass windows for
example, and other energy forms also kill birds in far greater numbers -
notably motor cars, and oil spills from tankers.
Of course the glib comments don't tell the whole story, but I do rather
think the original article is a non-news item. The overall number of
birds killed is insignificant - a greater problem is where turbines are
sited on migratory paths for specific species (where American eagles are
always mentioned), where there may be a problem. In summary, it's
necessary to consider bird flight patterns when siting the turbines, but
not a reason to stop turbines altogether! Experience has also shown how
to space rows of turbines so they kill less birds, and modern blades
rotate slower than earlier models, so are less likely to hit birds anyway,
and today's mono-towers are less attractive to birds than the early open
lattice structures were.