Wind Energy Sweeping Away Wildlife?

  • A single wind turbine can change air currents, creating dangerous winds for birds and other airborne wildlife. (Photo by Michael Tyas)

Wind energy is one of the fastest growing sources of new electricity in the United States. For some environmentalists, that’s
good news. Wind turbines don’t spew smoke into the air. There’s no nuclear by-product. But there is an environmental risk. To see it, you have to view the wind turbines through the eyes of a bird.
The GLRC’s Dustin Dwyer has more:

Transcript

Wind energy is one of the fastest growing sources of new electricity in the United States.
For some environmentalists, that’s good news. Wind turbines don’t spew smoke into the
air. There’s no nuclear byproduct. But there is an environmental risk. To see it, you
have to view the wind turbines through the eyes of a bird. The GLRC’s Dustin Dwyer
has more:


Chandler Robbins has spent a lot of time studying how birds kill themselves. He says he
would go out on windy nights to the Washington Monument in Washington, D.C. He’d
stand at the bottom of the 555 foot tall obelisk and watch the birds at the top:


“Just as they get to the tower, they just go around the edge of it and bang, the turbulence
from the winds going around the tower, sweeps those birds against the tower, and they’re
killed.”


Speaking at a conference, Robbins tells the crowd he once watched more than 500 birds
slam into the monument in one night, and that monument is standing still. Now imagine
wind turbines, some of them about as tall as the Washington Monument, with spinning
blades that reach nearly a football field in diameter.


Alex Hoar is with the U.S. Fish and Wildlife Service. He says a single turbine can now
change air currents for three acres around the turbine itself:


“So, if you put up a hundred turbines, the blades are sweeping 300 acres. So, that’s a large
space. And what we don’t know is when are birds and bats at risk.”


We don’t know because no one has really studied it. Both Alex Hoar and Chandler
Robbins say scientists know a lot about where birds take off and where they land. They
know about migration patterns, but they don’t know about what birds do, or where they
go while they’re in the air.


So, with more wind farms being built across the country, it’s not clear what affect they
might have on bird populations, but some suspect it won’t be good. Peter Kailing works
with an environmental consulting company. He recently did an environmental impact
study for a new 47 hundred acre commercial wind farm in Michigan. He says scientists
can learn a lot from the wind farms that have already been built. He says the ones that
have done the most damage to wildlife have a few things in common:


“The turbine was in a narrow valley, or a mountain-pass, or on the edge of a large
water body with steep wooded cover that was used by migrating songbirds, there’s almost
always a topographical association.”


Weather also plays a role. Peter Kailing and others say that birds tend to avoid cloud
banks by flying under them. That could put them in the path of turbine blades. So, one
way to limit damage would be to shut the turbines down on cloudy days.


Chandler Robbins says better technology could also limit damage. He says turbine blades
could be equipped with sensors:


“If a bird or a bat collided with that blade, it would set up enough vibration so that the
blade could be feathered temporarily to avoid other birds striking until the immediate
problem is over.”


Feathering essentially means that you twist the angle of the blade so that wind passes
over it, rather than pushing the blade into a spin. That way, birds aren’t sucked into it.
It’s basically the turbine’s braking system. Some say you don’t even need a sensor on the
turbine. They say engineers could monitor radar and thermal imaging. That would tell
them if any migrating birds are in the area, and if they are, feather the blades.


Of course, the absolute safest solution in the short term might be just to stop building
wind farms, but you’d be hard-pressed to find anyone who thinks that’s a good idea.
Most seem to realize that any way of making electricity will have some impact on the
environment. The question is what can be done with each of them to minimize the risk.
With wind energy, that work is just getting started.


For the GLRC, I’m Dustin Dwyer.

Related Links

Problem Geese Herded From Suburbia

Canada Geese are a familiar sight across the Midwest. Every fall the massive birds wind their way across the area as they migrate from Canada. But now, the region is also playing home to growing populations of resident geese. Instead of migrating, they stay near shopping centers and residential areas, where there’s a ready supply of food. For several years, one such population kept the residents of a Rochester, New York suburb feeling like they were in a state of siege. The geese chased pedestrians, caused traffic accidents, and left unpleasant signs of their presence almost everywhere. So town officials have hired an unusual business to encourage the geese to live somewhere else. The Great Lakes Radio Consortium’s Bud Lowell has more:

Transcript

Canada Geese are a familiar sight across the Midwest. Every fall the massive birds wind their way across the area as they migrate from Canada. But now, the region is also playing home to growing populations of resident geese. Instead of migrating, they stay near shopping centers and residential areas, where there’s a ready supply of food. For several years, one such population kept the residents of a Rochester, New York suburb feeling like they were in a state of siege. The geese chased pedestrians, caused traffic accidents, and left unpleasant signs of their presence almost everywhere. So town officials have hired an unusual business to encourage the geese to live somewhere else. The Great Lakes Radio Consortium’s Bud Lowell has more.


“There’s hundreds of geese here. They come in the springtime, and after me being here about three or four times, I ended up right down to about 30 or 40 of them.”


Gordon Kornbau is at Westfall Town Park in Brighton, New York with his border collie, Arrow.


“You have to hit ‘em very hard in the beginning, just aggravate the heck out of them twice a day…. different times of the day. They get used to the fact that you’re not going away and they decide to nest somewhere else.”


Kornbau and Arrow are at this park to herd geese. There’s a 10-acre, roughly Y-shaped pond here…tucked up against an expressway. Neatly manicured lawns slope down to the water – and it turns out, that’s paradise for geese. They don’t like tall brush that conceals predators, so there are a lot of them here in the short grass.


But the geese don’t leave the park looking like paradise to humans.


“Look around here and notice all the…this whole blacktop last year was…from one end to the other, a square foot, you couldn’t walk. Same with the grass and stuff like that…Goose poop? Yeah…now we’ve got it down to a minimum. But we’ve got to keep after them. Now they’re done molting and the goslings are ready to fly so we’ve gotta get on them heavy again…. Arrow! C’mere…Arrow (whistles).”


Kornbau sends his collie to circle the pond. The geese know she’s coming. They splash, honking into the water as the dog runs toward them.


“All the way out – (whistles) – keep going!”


(Sound of geese honking)


“Basically, border collies are trained on sheep for years and years. Just transferring them from sheep over to geese isn’t that big a deal.”


Arrow, the Border collie, is half the geese herding process. Under his arm, Gordon Kornbau has been carrying a radio controlled, gas-powered model boat.


As the dog chases the geese into the water, he drops the boat into the pond


(Sound of model boat engine)


Kornbau steers the boat in circles. The annoyed geese take flight, and make for the far corner of the pond.


The Border collie rounds the pond and chases them back. Kornbau launches his boat again.


Every day he does this, a few more of the birds decide to leave for a quieter home someplace else.


“I send Arrow out and she’s scaring them all up…and people are standing there saying, ‘What are you doing – my kid’s having fun feeding the geese!’ Well –I’m sorry but – I have to be the bringer of bad news.”


This “geese herding” has been checked out by New York’s Department of Environmental Conservation. The DEC worked with Gordon Kornbau and the Town of Brighton, and gave the Town’s geese control program it’s OK.


Once in awhile, though, some people do get upset with Kornbau and Arrow. But he says they calm down once he shows them his business card.


A few passersby today seem intrigued by what he’s doing.


“What kind is it? –Border Collie – oh…so this is what a border collie looks like. Yeah…I’ve read about you guys in the paper. Having fun chasin’ those geese, huh?”


The Border collie, Arrow, knows the job is done. She’s back in the station wagon and ready for the next pond.


(Sound of door slamming)


“Nothing to it…good girl…. she’s the best!”


So how does somebody become a geese herder?


Gordon Kornbau was a mechanic at a golf course. He was looking for a business of his own, and that’s when he ran across a newspaper article about businesses in North Carolina and New Jersey that made money by herding geese.
He decided he could do the same thing. Now, Kornbau says he’s got the “best job he’s ever had.” No comment other than a lot of tail wagging from Arrow.


For the Great Lakes Radio Consortium, I’m Bud Lowell.

Station Tracks Migratory Bird Health

As the weather gets warmer, migratory birds head north from
their winter homes and fly through the Midwest to nesting sites in the
Great Lakes Region. Along their journey, rivers like the Illinois
provide
habitat, food, and shelter for the birds. The Great Lakes Radio
Consortium’s Jonathan Ahl reports on one small research station on the
Illinois River that tracks these birds to learn more about the
environment
we live in: