The Incredible, Edible Weed

  • People brought Garlic Mustard to the US in the mid-1800s because they liked it, to eat. And they even used it for medicine.(Photo courtesy of the NBII, Elizabeth A. Sellers)

An invasive plant called Garlic Mustard is taking over forests in the Eastern half of the country, and it could be causing long term damage. Julie Grant reports that some people are getting smart in their efforts to get rid of Garlic Mustard:

Transcript

An invasive plant called Garlic Mustard is taking over forests in the Eastern half of the country, and it could be causing long term damage. Julie Grant reports that some people are getting smart in their efforts to get rid of Garlic Mustard:

Brad Steman spends a lot of time in the woods. He likes the serenity. But as we walk through this park, he winces. The entire forest floor is carpeted with one plant and one plant only: Garlic Mustard. Thousands of them. The thin green stalks are as tall as our ankles.

Steman calls it “the evil weed.” Its triangle-shaped leaves shade out wildflowers, so they don’t grow. Even worse, Steman says Garlic Mustard poisons baby trees.

“So a forest filled with Garlic Mustard you will see very little regeneration of that forest, very few seedlings, small trees. So looking down the line, once those large trees start dying off there’s nothing to replace them. And that now is the greatest threat to our Eastern forests.”

Steman says every year Garlic Mustard is spreading farther into the woods. Anywhere the ground is disturbed.

“So here’s a big stand of it along a trail. This is typically where it starts. This is thick. This is a healthy stand. There’s potential there for an explosion. So we should probably pull some. I’ll pull some; you don’t have to pull any.”

Thank goodness he’s doing it – it looks like tedious work. Steman crouches down and starts pulling them out of the ground, roots and all. He sprayed herbicide on some of it, and so far this season he’s filled 35 big garbage bags with Garlic Mustard plants. He’s sick of weeding. But it doesn’t look like he’s made a dent here. All along the Eastern half of the US and Canada people are pulling up Garlic Mustard from parks and just throwing it away. But some people don’t like this approach.

“All these people are very shortsighted when they’re doing that.”

Peter Gail is a specialist in edible weeds.

“They’re not looking for other alternative uses – creative ways to use these plants that would be profitable, that would be productive.”

Gail says: “If you can’t beat ‘em, eat ‘em.” People brought Garlic Mustard to the US in the mid-1800s because they liked it, to eat. And they even used it for medicine. Yep. That same nasty weed.

Gail says today Garlic Mustard just needs an image makeover. Some weeds have become big stars in the cooking world. A few years ago Purselane was just an unwanted vine, with its fleshy, shiny leaves matted to the ground. Now it’s known as a nutritional powerhouse, and is the darling of New York and LA eateries. Gail wants that kind of fame for Garlic Mustard.

“This is a Garlic Mustard Ricotta dip, Garlic Mustard salsa, stuffed Garlic Mustard leaves – these are all things you can do with this stuff. It’s fantastic!”

Garlic Mustard seeds taste like mustard, the leaves taste like garlic and the roots are reminiscent of horseradish. Gail says people should go after Garlic Mustard in the parks, but then they should take it to farm markets to sell.

“My normal statement is that the best way to demoralize weeds is to eat them. Because when you eat them they know you like them and they don’t want to be there anymore, and so they leave.”

Today Gail decides to blend a pesto using the early spring leaves. He picks every last Garlic Mustard in his yard to make a batch.

“Well there it is, garlic mustard pesto. And it isn’t bad, is it?”

“It’s delicious.”

For The Environment Report, I’m Julie Grant.

“I’ll use that on ravioli tonight.”

Related Links

Killer Whale Shows Reconsidered

  • Animal rights activist Will Anderson says there is nothing healthy about the relationship between captive marine mammals and their keepers. (Photo Courtesy of Milan Boers CC-2.0)

People who want to watch marine mammals like dolphins often head to
theme parks such as SeaWorld. But after a killer whale at one SeaWorld
killed its trainer last month, critics are calling for a reevaluation
of keeping these huge animals captive. Ann Dornfeld has the story:

Transcript

People who want to watch marine mammals like dolphins often head to
theme parks such as SeaWorld. But after a killer whale at one SeaWorld
killed its trainer last month, critics are calling for a reevaluation
of keeping these huge animals captive. Ann Dornfeld has the story.

In the wild, a killer whale’s world sounds something like this:

[Killer whale calls in British Columbia]

But most people see killer whales in an environment like this:

[Electric guitar at SeaWorld show, chanting of “Shamu! Shamu!
Shamu!”, audience claps in time]

SeaWorld calls all of its performing whales “Shamu.” Millions of
people have visited SeaWorld over the decades to get splashed by
Shamu’s tail and watch trainers leap off the killer whales’ noses. The
trainers hug and kiss the animals between high-flying stunts.

But animal rights activist Will Anderson says there is nothing healthy
about the relationship between captive marine mammals and their
keepers. The waters around Seattle, where he lives, are home to wild
killer whales. Anderson has worked to free captive killer whales for
40 years.

“The relationships they have with their trainers are
nothing less than ‘Well, what else is there to do?’ If you’re starved
for what you innately need – social bonding – you’re gonna settle for
whatever morsel you can get.”

Killer whales are actually huge dolphins, not whales. Anderson says
tanks are no place for animals which roam up to 100 miles each day in
their native waters.

“Their bodies and their minds, and their behaviors,
their needs and their huge size, they are all adapted for the wild.
They are not adapted for tanks.”

At SeaWorld, Julie Scardina is the Animal Ambassador. She handles
public relations for the theme park. She says just because killer
whales can roam 100 miles a day in the wild doesn’t mean they often
do.

“The 100 mile statistic there is actually just a
capability. They have the capability of roaming that far, just like
humans have the capability of walking 20 miles or more per day. We
provide opportunities for exercise, for play, and of course during our
shows they get plenty of exercise.”

Scardina used to train killer whales. She says the tricks show the
public what the animals are capable of. And she says keeping killer
whales in a more naturalistic, aquarium-like environment wouldn’t
serve the animals well.

“I’ve worked with animals for over 30 years. There’s
no way you can convince me that it would be better to let an animal
kind of hang. That’s kind of like saying it’s okay to let a person sit
on the couch if they’d like. You need to provide stimulation, you want
to get them up and moving.”

Scardina says the goal of SeaWorld’s Shamu shows is to encourage
marine conservation.

“Well, certainly our mission is to educate people
about the oceans, to inspire them. And that’s what obviously our hope
is, is by seeing these animals and how incredible they are – I know
that’s how I became inspired when I was a child.”

But in a promotional video for SeaWorld’s main killer whale show,
called “Believe,” SeaWorld employees suggest a different theme… more
conquest than conservation.

“How do we get in the water with the top predator in the ocean, y’know. that kills and eats anything it wants at any time.
I thought for a moment right there, y’know what, this is really crazy
what we do. But we are doing it!”

The video, and the “Believe” show itself, focus on the power of the
human spirit – not the marine environment.

Activists like Will Anderson are calling for theme parks like SeaWorld
to return killer whales to their native waters, protected by huge
enclosures. There is general agreement that captive killer whales
wouldn’t survive if released into the open ocean.

For The Environment Report, I’m Ann Dornfeld.

Related Links

Seeing Snakes as Worth Saving

  • Biologist Tobi Kiesewalter takes out a black rat snake at the visitor's center at Murphy's Point Provincial Park in Ontario. (Photo by Karen Kelly)

As kids, many of us come to see
snakes as frightening, evil creatures.
In some places, that ingrained fear
has taken a toll on the snake population.
Karen Kelly met up with some folks
who are trying to improve one snake’s
image – before it disappears:

Transcript

As kids, many of us come to see
snakes as frightening, evil creatures.
In some places, that ingrained fear
has taken a toll on the snake population.
Karen Kelly met up with some folks
who are trying to improve one snake’s
image – before it disappears:

(sound of truck, bumping on a road)

George Sheffield drives his truck along the dirt path that leads to his family’s
vacation cottage. He keeps an eye out for long, black snakes.

“It might be a good day to see a snake. It was cold last night so they’ll be
looking for sun today to heat back up.”

Sheffield’s land is one of the few places where black rat snakes still thrive in
Ontario. They’re a threatened species here, partly because people have moved
into their habitat.

But also, because they’re often six feet long, so people get scared and kill them.
The black rat snake is the longest snake in Canada. It’s not poisonous, but it’s a
constrictor that eats small animals.

(sound of walking towards cottage)

Once we’re at Sheffield ‘s camp, he checks out one of the snakes’ favorite spots
– the roof of his cottage.

“The one time, there 3 or 4 out on the roof, with portions of others, with their
heads or tails sticking out of soffits. So they do inhabit the cottage. I wish they
didn’t, but until I fix it, I can’t blame them.”

Sheffield is one of a growing number of landowners who are trying to protect
the black rat snake. They’re putting up nesting boxes in fields and wooded
areas to give the snakes a warm and safe place to spend the winter.

But the biggest challenge is just convincing people not to kill them.

Kiesewalter: “Do you want to hold the snake?”

Children: “He’s pretty heavy.” “He feels kind of like rubber.”

Tobi Kiesewalter is a biologist at Murphy’s Point Provincial Park in
southeastern Ontario. It’s used by as many as 500 black rat snakes – as well as
a lot of campers, swimmers, and boaters.

It’s a perfect chance to teach people about the snake. So every day, Kiesewalter
takes a rat snake out of a cage in the visitor’s centre and tries to persuade people
to leave them alone.

“I hear about it all the time, people coming and telling us about how their dad
had killed snakes before. Kids will tell you anything. And, as with many
reptiles, the loss of even one mature adult can cause a dip in population because
we know they’re only reproducing every two years.”

There’s a lot of effort to help this snake. Culverts are dug under highways to
give them a safe route back and forth. There are road signs that say, “Please
brake for snakes.” There’s even an adopt-a-snake program.

But the fact is, the black rat snake isn’t in danger in other parts of North
America. So why save it here?

For George Sheffield, the answer is simple.

“I grew up with them here, I think it would be a shame if man’s activities
caused the end of another species in another area. We’ve already done way too
much to degrade the environment and the number of species, so anything
anybody can do is good.”

For The Environment Report, I’m Karen Kelly.

Related Links

Close Contact Endangers Dolphins

  • More people are feeding dolphins and getting too close to them in their boats. (Photo courtesy of Mote Marine Laboratory)

Television dolphins like Flipper
and the performing dolphins at
Sea World can trick people into
thinking it’s okay to feed and
swim with wild dolphins. But
Rebecca Williams reports dolphin
researchers say our behavior can
hurt and even kill dolphins:

Transcript

Television dolphins like Flipper
and the performing dolphins at
Sea World can trick people into
thinking it’s okay to feed and
swim with wild dolphins. But
Rebecca Williams reports dolphin
researchers say our behavior can
hurt and even kill dolphins:

(sound of a shorebird crying out)

Fort Myers beach is packed with tourists. I meet a guy named Justin who’s here in Florida from Cleveland. He’s already gotten close to wild dolphins.

“We were out here swimming and dolphins got within a foot of us. It was amazing. I’ve never seen that.”

In this case, he wasn’t doing anything wrong – because the dolphins came up to him. But swimming with wild dolphins can actually be considered harassment if you approach them or touch them.

That’s bad for the dolphins because it can change their behavior. It can disturb their feeding and resting behavior. And it can separate dolphins from their babies.

So it’s illegal to swim with or harass dolphins. You can get fined and even end up with some jail time. And that’s just the beginning of the dolphins’ problems.

Dolphin encounters are getting more common in Florida and Hawaii and a lot of other places. There’ve been more tourists and more boaters in the water… and more commercial operations that promise you’ll get a chance to feed or swim with dolphins.

As cool as it might be for us, it’s actually terrible for dolphins. When people feed them they can get addicted to human handouts.

Cartoon Dolphin PSA: “For me it started with one hit of sardines, oh sardines… that’s where I learned to beg. It was easy to score free fish… with this dolphin smile? Yeah it’s illegal but no one cares…”

That’s a cartoon dolphin in rehab with a bear, a raccoon and a seagull. All those other animals we’ve gotten into some bad habits with.

It’s a message put out by the Mote Marine Laboratory in Sarasota.

(sound of dolphin playing in tank at the Marine Lab)

Randall Wells is the head of dolphin research at the lab. He’s spent almost four decades studying dolphins.

He says, in recent years, there’s been a dramatic increase in the number of dolphins getting into trouble with people. More people feeding them and getting too close to dolphins in their boats.

“And we’ve seen an increase in mortality from these kinds of interactions – from people luring animals in towards boats, in towards fishing gear. Dolphins have begun to take bait from lines getting tackle including hooks and lures in their bodies and killing them or seriously injuring them.”

He says, if you feed a dolphin, it’ll often start begging for food from people. And that dolphin will teach its babies or other dolphins to beg.

Sometimes they’ll even eat things that aren’t food. One dead dolphin had a plastic snake in its stomach.

If dolphins get closer to boats, they can get snared in fishing line. It can slice through their flippers. Once, Randall Wells rescued a dolphin that had a Speedo on its head. And because it couldn’t shake it off, the suit was cutting into the dolphin’s flesh.

Wells and his team have been doing a lot of outreach to stop people from getting too close to dolphins. And he says most of the time, it works.

“But there’s still a half percent of people that, by their own admission, insist on interacting with these animals – feeding them and approaching them in ways that are illegal, just because they can and they’ve never seen the negative consequences of doing that.”

If you want to go on one of those dolphin viewing tours, there are some ways to make sure the tour operator’s not adding to the problem.

Stacey Horstman helps run a program called Dolphin Smart. It certifies dolphin tours as responsible.

Right now there are only four businesses in Key West and one in Alabama that’ve gotten certified. But, she says, if you’re in a place without Dolphin Smart tours, you can still ask questions.

“Just to make sure that feeding is not being promoted in any way, that they’re promoting responsible viewing from a distance.”

That means staying at least 50 yards away from dolphins.

She says any ad that shows people swimming with dolphins or handing them fish is usually a sign of an irresponsible business. So those are ones to stay away from.

Dolphins might look cute and friendly, but Horstman says they are wild animals and they need their space.

For The Environment Report, I’m Rebecca Williams.

Related Links

Keeping Panthers and People From Colliding

  • Rebecca Galligan with her dogs Roscoe and Sable in their new panther-proof pet house. Galligan and her husband lost their dog Riley to a panther, so they had this enclosure built to keep their pets safe. (Photo by Rebecca Williams)

People are killing Florida panthers.
Usually it’s not intentional. But
Rebecca Williams reports biologists
are trying to figure out how to keep
panthers and people from running into
each other:

Transcript

People are killing Florida panthers.
Usually it’s not intentional. But
Rebecca Williams reports biologists
are trying to figure out how to keep
panthers and people from running into
each other:

There are only about 100 Florida panthers left in the wild. They’re endangered.

If you live down here, it’s one thing to know there are panthers hunting for food in the Everglades. But it’s something else when they visit your backyard.

(sound of tropical birds singing)

Rebecca Galligan and her husband didn’t give panthers all that much thought. Until one day, when they came home from work, and found their dog Riley had been killed.

“The scratches on the body and the way he’d been killed it was pretty obvious it was some sort of wild cat.”

Two days earlier something had killed their neighbor’s sheep. Then a dozen goats got killed.

A biologist decided the predator was a panther. In the past few years in South Florida, more people have been losing pets and farm animals to hungry panthers.

Galligan calling to dog: “C’mere, have a seat!” (Roscoe sniffs the microphone)

Now, when she’s away, Rebecca Galligan keeps her dogs Roscoe and Sable in a little panther-proof house. It’s made out of steel and chain link fencing.

“There’s so much nature and wildlife, and so I mean, we just can’t destroy it all because we want to be safe. That’s why we had this pen built, so we can keep the animals a little safer from the animals that live around us.”

And a lot of people here think the panthers have a right to stick around.

But some say there’s a gaping hole in the law that’s supposed to protect panthers.

The panther has never had what’s called critical habitat set aside. That means developers don’t have to consider the land panthers need to survive. Panther habitat or not, they can just build.

So panthers are getting crowded out by subdivisions and huge new cities.

Andrew McElwaine is president of the Conservancy of Southwest Florida. He’s asked the Obama Administration to officially give panthers that habitat.

“So, the more habitat we take away, we’re forcing panthers to move out. We’re getting reports of panthers in urban areas of Southwest Florida looking for somewhere to live, if you will.”

And, as people move in, panthers are becoming roadkill.

Last year 10 panthers were killed by cars. So far, this year, six more panthers have been killed.

(sound of cars whizzing by)

“There are some panther tracks here. There’s one there… and there…”

Mark Lotz is a panther biologist. We’re hanging out in an underpass below the highway. It was built for panthers. Miles of fences run along the highway and make a funnel, so panthers have to go below the road.

Lotz says there are 36 panther underpasses on this stretch of highway. And he says fewer panthers get hit here. But underpasses are expensive – about $2 million each. And giving panthers room to live isn’t always even that simple.

Lotz says the biggest challenge is getting people to adapt to panthers. To him, the cats are majestic. But he also knows a lot of people think they’re terrifying. Somebody actually shot a panther a few months ago.

“Naysayers could make the argument there’s no panthers in Pennsylvania or any other eastern state and things are going just fine. But then I would counter – look what’s happening with deer populations there. You know, panthers are part of the ecosystem. Without them there’s just something missing. In a way part of the wildness disappears.”

But if panthers keep running out of space, they could disappear.

We talked to the Secretary of the Interior, Ken Salazar. And we asked him whether he’d set aside critical habitat for panthers.

“Yeah, we’ll have to get back to you on that.”

That’s been the kind of response he’s given to other reporters too.

Giving panthers habitat protection would mean more obstacles for developers. And, in this economy, that could be pretty unpopular.

For The Environment Report, I’m Rebecca Williams.

Related Links

Zapping Germs Off Your Food

  • Researcher Kevin Keener has been working on a device that turns the air inside food packaging into ozone (Photo by Ken Hammond, courtesy of the USDA)

Researchers are working overtime to find ways to kill dangerous bacteria in food such as Salmonella and E. coli. Rebecca Williams reports one researcher has found a new way to kill bacteria:

Transcript

Researchers are working
overtime to find ways to kill dangerous bacteria in food such as Salmonella and E. coli. Rebecca Williams reports one researcher has found a new way to kill bacteria:

Food processors expose produce like lettuce to ozone for a few seconds or minutes to kill bacteria.

Kevin Keener has been working on a device that turns the air inside food packaging into ozone.

Keener is a food process engineer at Purdue University.

He attaches the device to the outside of food packages – like a bag of lettuce – and applies electrodes that send high voltage through the bag.

“Visually it’s very Frankenstein-ish. It’s a safe process, there is a high voltage, but it’s similar to a spark you’d get with an electric fence.”

Keener says the ozone spends more time with the food so it kills more bacteria.

There’s a problem though – in some of their tests the device turned green spinach white.

So there are a few kinks to work out. But food companies are interested and we might see this commercialized in a year or two.

For The Environment Report, I’m Rebecca Williams.

Related Links

Usda Kills Wildlife

  • USDA Wildlife Services Killed 90,000 Coyotes in 2007 (Photo courtesy of Michigan Department of Natural Resources)

More than a hundred environmental
organizations want the incoming head of
the US Department of Agriculture to stop
killing wildlife. The agency has an office
that kills wild animals to save livestock.
Jennifer Szweda Jordan has more:

Transcript

More than a hundred environmental
organizations want the incoming head of
the US Department of Agriculture to stop
killing wildlife. The agency has an office
that kills wild animals to save livestock.
Jennifer Szweda Jordan has more:

The Center for Biological Diversity, the Sierra Club, and dozens of other groups signed on to a letter to Tom Vilsack. Vilsack is President-elect Obama’s pick for Agriculture Secretary. The environmental coalition is upset about the department’s Wildlife Services Agency. That agency removes or kills animals that threaten crops, farm animals, or cause other nuisances. Wildlife Services agents reported in 2007 that they killed more than two million animals, including 90-thousand coyotes, sometimes through poisoning.

Tom Vilsack did not return a call seeking comment about the letter.

The environmental groups say the poisonings and killings disrupt the balance of nature, and can leave persistent chemicals behind.

For The Environment Report, I’m Jennifer Szweda Jordan.

Related Links

Ghostbikes: Two-Wheeled Memorials

  • With more cyclists on the road, there is concern about keeping accident rates from going up as well (Photo by Corbin Sullivan)

There’s a grass roots effort to
honor people killed while riding bicycles.
It’s called “ghostbikes”. Chuck Quirmbach
reports:

Transcript

There’s a grass roots effort to
honor people killed while riding bicycles.
It’s called “ghostbikes”. Chuck Quirmbach
reports:

Only a tiny number of bicyclists are hit and killed. But some riders say the death toll should be
zero.

So, in about sixty communities across the US, bicycle groups are painting bikes all white. Then
they chain them to a post near the site of the bicycle fatality.

Rider Jessica Weinberg compares the skeleton-looking ghostbikes to white crosses placed where
people die in motorized vehicles.

“I think anyone who drives on the highway when they see a cross on the side of the road, that
does kind of make you think for a minute, ‘should I drive a little more carefully here, there was a
tragedy here, what was the situation?’ We want the same thing with the ghostbikes.”

Weinberg says with high gas prices putting more bikers on the road, ghostbikes may help keep
accident rates from going up.

For The Environment Report, I’m Chuck Quirmbach.

Related Links

Botulism and the Beach

  • The beach looks beautiful... until you stumble on dead birds and fish killed by Type E botulism. (Photo by Rebecca Williams)

A deadly toxin is spreading across
the Great Lakes, killing fish and birds.
Rebecca Williams reports scientists are
trying to put the puzzle together as quickly
as they can:

Transcript

A deadly toxin is spreading across
the Great Lakes, killing fish and birds.
Rebecca Williams reports scientists are
trying to put the puzzle together as quickly
as they can:

(sound of waves lapping the beach)

It’s one of those perfect beach days. Not too hot, not too crowded. Everything’s
just right.

Unless you don’t like rotting fish and dead birds full of maggots.

Hunter Brower is hanging out at this Lake Michigan beach. He says he’s seen a
lot of dead gulls here in recent years.

“It’s disgusting. We’re out here to enjoy our time and it’s just not right.”

The birds and fish are being killed by Type E botulism. Basically, it’s food
poisoning. For about a decade now, botulism has been killing huge numbers of
birds in the Great Lakes.

We’re talking about more than 75,000 birds – and scientists think that’s probably
a very conservative estimate. That’s because birds could be dying and not
reaching the shore. And it’s very hard to know how many fish are getting killed.
They’re harder to diagnose.

“It’s really one of nature’s most potent toxins.”

Mark Breederland is with Michigan SeaGrant. He says some studies show the
toxin can paralyze fish.

“They can actually lose their orientation and be bobbing up and down vertically
and that would be easy pickin’s if you’re a loon.”

Loons and other birds eat those poisoned fish, or, even grosser, they’ll eat the
maggots in dead birds on the beach, and get sick. The toxin can make birds lose
control of their neck muscles. Their heads fall in the water and they drown.

Beaches full of dead fish and birds aren’t great for tourism. But scientists are
more worried about what this means for endangered species – from the giant lake
sturgeon to the tiny piping plover.

Mark Breederland says they’re also worried about the thousands of migratory
birds that get killed on their way south in the fall.

“They’re just driving down their migratory highway, pulling over for a rest stop to
get something to eat, and that’s their last and final resting spot.”

So scientists are trying to pin down what’s going on.

There’s one main hypothesis. It involves some nasty little critters: invasive zebra
mussels and their cousins, the quaggas. They got into the lakes in the ballast
water of foreign ships.

Both mussels suck in lake water and filter it. They’ve made the lakes a lot clearer
than they used to be.

The clearer water means more sunlight can reach the lake bottom, and that
kick-starts algae growth. When the algae die, it sucks oxygen out of the water.
And, all of that is perfect for a bacterium that produces the botulism toxin to go forth
and multiply.

Okay, now, remember those pesky mussels? Scientists suspect they can take in
the toxin but they’re not affected by it. But fish that eat the mussels get sick.

One fish in particular loves to eat mussels. It’s the invasive round goby. And
there are lots and lots of gobies in the Lakes. That could mean lots of poisoned
snacks for bigger fish and birds.

Researchers have a bad feeling about all this, and they’re trying to confirm their
hunches.

(sound of boat engine starting up)

Brenda Moraska LaFrancois is headed out on Lake Michigan to investigate. She’s
part of a team that’s collecting samples from the lake bottom.

She says this is a tough mystery to unravel.

“These are really complicated systems and unfortunately they’re continuing to
change.”

As soon as scientists think they have a handle on what’s going on, some new
invader gets in and messes everything up again. So it’s really hard to know what
could be done to stop the outbreaks.

The experts say, if you go to the beach, it’s safe to swim. But you shouldn’t eat any
fish or waterfowl that seem sick.

Your local wildlife managers might tell you: don’t touch it, but get something to
bury the dead animal down in the sand, so other birds won’t feed on it and spread the
toxin.

For The Environment Report, I’m Rebecca Williams.

Related Links

Turbines and Bats: A Deadly Combo

  • Many bats are being killed by wind turbines (Photo courtesy of the US Fish and Wildlife Service)

The wind turbine industry has made
changes to reduce the number of birds killed
by the spinning blades. But scientists are
finding that more bats are being killed.
Rebecca Williams reports one research team
thinks it now knows why:

Transcript

The wind turbine industry has made
changes to reduce the number of birds killed
by the spinning blades. But scientists are
finding that more bats are being killed.
Rebecca Williams reports one research team
thinks it now knows why:

It’s been a mystery why bats are getting killed by wind turbines. They’re
usually great at avoiding collisions because they sense moving objects
even better than still ones.

A team from the University of Calgary looked at dead bats near
turbines. They found that 90% of the bats had internal bleeding.

Erin Baerwald is the lead author of the study. She says there’s a sudden
drop in pressure near the tips of the turbine blades. And when bats fly
close enough, the pressure drop makes their lungs over-expand and
burst. She thinks the bats are attracted to the turbines.

“Maybe they see these tall turbines as trees.”

That’s because most of the bats that are getting killed are tree roosting
bats.

Baerwald says researchers are looking at ways to change turbines to
avoid killing bats.

For The Environment Report, I’m Rebecca Williams.

Related Links