Re:Why Wind Turbines Have Three Blades
by Houshalter on Friday May 06, 2016 @12:03PM
(#11644848)
Fair point, I was just responding to the idea that wind turbines would kill all the birds, which isn't realistic. As a percentage of the bird population, it's negligible.
I don't see any reason why bald eagles would be more likely to be killed by turbines than other species of birds. If only 0.01% of birds are killed by turbines, then they would only kill 1 bald eagle a year out of thousands.
Regardless, this is more of a reason to invent solutions for repelling birds from turbines. Maybe we could come up with noises or lights that repel them. Or drones, or a water cannon robot. But I'm not certain it's even an issue.
The current rule is something like 1,200/year. There are about 143,000 bald eagles in the US. The 4,200 number is set at a level which they think the species can sustain. I don't know why bald eagles would be more likely to be killed by turbines, but apparently they are:
http://www.fws.gov/midwest/wind/wildlifeimpacts/index.html
"Not all bird species are equally vulnerable to wind turbines. Eagles appear to be particularly susceptible."
Not all birds fly the same way, in the same regions, at the same altitudes. Balds eagles tend to soar and hunt in places we like to put wind turbines. Small birds tend to move smaller distances, often in about 100m around a water source.
Thanks.
Wind turbines kill <this type of bird> is highly location specific; so again, saying wind turbines kill lots of bald eagles is also not telling the whole story.
And eagles may kill smaller birds, so the net might be positive? More sub-optimization.
...Eagles aren't generally bird hunters. Bald eagles for instance, eat mostly fish.
It's a nice thought though, just kill off the big birds, and watch the benefits "trickle down" to the little birds. /s
You're going to have to provide documentation of this.
Of what? The new rule allowing for 4,200 to be killed each year is a simple Google away. The conjecture that house cats don't kill many eagles is just common sense, and if that's what you're referring to then I assume you're just making a joke.
It may still be a nonissue, of course, but the comparison with cats doesn't tell the whole story.