Keeping Your Lawn From Bugging You

  • There's a movement to stop using pesticides and sprays on your lawn. (Photo courtesy of Horia Varlan CC-BY)

A lot of us have a love-hate relationship with our lawns. We love them when they’re lush. We hate them when they’re full of dandelions and dead patches. It’s easy to have someone come out and spray pesticides to take care of weeds and bugs. But some people say it’s not necessary and could do more harm than good. Rebecca Williams reports:

Transcript

A lot of us have a love-hate relationship with our lawns. We love them when they’re lush. We hate them when they’re full of dandelions and
dead patches. It’s easy to have someone come out and spray pesticides to take care of weeds and bugs. But some people say it’s not necessary and could
do more harm than good. Rebecca Williams reports:

So, you might be using pesticides on your lawn right now. And of
course, the pesticide industry says that’s okay.

The industry says the chemicals are safe to use on the lawn if you use
them correctly.

Alan James is president of Responsible Industry for a Sound
Environment, or RISE. It’s a trade group for pesticide companies.

“If individuals or professional applicators read the labels and follow
labels, the likelihood of misuse of pesticides is virtually zero because the
labels provide all the information a consumer or professional needs to
apply products both efficiently and safely.”

But the problem is, not everybody reads the label.

Alan James says if you’re hiring someone to spray your lawn you should
make sure they’re certified and insured. You should also take your kids’
and pet’s toys off the lawn before they spray.

But a lot of people say there’s no point in using chemicals just to make
your lawn look good.

Jay Feldman is with the group Beyond Pesticides. He says of the 30
most common lawn pesticides, most of them are suspected by the
Environmental Protection Agency to cause cancer, birth defects or other health problems.

“There’s a range of adverse effects that are indicated as a part of the
pesticide registration program at EPA. EPA knows this information.
Why not remove pesticides from the equation, especially in light of the
fact that they’re not really necessary?”

There’s a movement to stop using pesticides in North America. Both
Ontario and Quebec have banned the sale and cosmetic use of
pesticides.

So if you’re not going to use pesticides, what do you do?

That’s a question Kevin Frank gets a lot. He’s an extension agent at
Michigan State University and an expert on lawns.

“I love to mow my lawn on the weekends because nobody can call me on
the phone or email me with questions.”

He’s been showing me green, healthy test plots of grass and some that
look sad and neglected. The scientists here have been working to find
ways to have good-looking lawns without a lot of chemicals.

Back in his office, Kevin Frank says he tells people they shouldn’t be
afraid to experiment.

“Do you have it in you to let it go for one season and see what happens?
And it could be ugly, so you’ve got to be prepared for that!”

He says a healthy, dense lawn is actually really good at fighting off
weeds and pests all on its own. So, how do you get a healthy, dense lawn
without a lot of chemicals? Frank says it might take a couple years to get
there. And it means going against conventional lawn advice.

“We’ve done a great deal of research here at Michigan State that runs
contrary to what I call ‘turf dogma’. You know: water deeply and
infrequently – and we’ve shown if you do it on a more frequent basis you
end up with a healthier plan overall.”

He recommends watering lightly – just 10 minutes – every day instead
of soaking the lawn once a week. Frank says it’s also good to fertilize
twice a year, use a mulch mower, and mow high instead of giving the
grass a buzz cut.

He says that could make your lawn so healthy, it might mean you won’t
need to spray or hire someone to spray your lawn.

He says the biggest adjustment in reducing pesticide use is managing
your expectations, and deciding how many weeds and bugs you can live
with.

For The Environment Report, I’m Rebecca Williams.

Related Links

Part 2: Food Ads and Kids

  • Researchers say food advertisers convince kids they need different food than adults. (Photo courtesy of the USDA)

Lots of people are concerned
that American children are
getting fat. More than one-
third are considered overweight
or obese. And some are pointing
the finger at those who manufacture
and advertise food for kids. In
the second part of our two-part
series on food and health, Julie
Grant reports on efforts to crack
down on food marketing targeted
at children:

Transcript

Lots of people are concerned
that American children are
getting fat. More than one-
third are considered overweight
or obese. And some are pointing
the finger at those who manufacture
and advertise food for kids. In
the second part of our two-part
series on food and health, Julie
Grant reports on efforts to crack
down on food marketing targeted
at children:

Have you ever tried going to the supermarket with a five year old? They’re cuckoo for cocoa puffs, and everything else on the shelves that’s colorful with big cartoon characters – strategically placed right at kids-eye level. So, They beg. They plead. Some even just grab what they want.

It’s called parent pestering.

Marion Nestle is Professor of Public Health Nutrition at New York University and author of several books on food politics. She says food advertisers convince kids they need different food than adults. And they want kids to pester their parents.

“I hear parents tell me all the time that the kids won’t even taste things because they say they’re not supposed to be eating that. They’re supposed to be eating chicken fingers, or things that come in packages with cartoons on them.”


Nestle says marketers are just trying to sell products – they’re not worried about obesity and other health problems caused by the processed food targeted to children. She’d like to see some big changes.

“If I were food czar, I would just say, ‘you can’t advertise to children, period.’ They’re not capable of making intelligent, adult decisions about what they’re eating.”

The Federal Trade Commission agrees the ads are a contributing factor to growing problem of childhood obesity. The FTC, the Food and Drug Administration and other government agencies will recommend changes to food marketing rules to Congress later this year.


Most people in the food and advertising industries say cutting off all marketing to kids would go way too far.

Elaine Kolish is Director of the Children’s Food and Beverage Advertising Initiative. It’s part of the Better Business Bureau. She’s been working with 16 of the major U.S. food manufacturers to change what is advertised to children.

Over the past few years, she says food manufacturers have spent millions of dollars to reformulate kids products – like cereals – to make them healthier.

“Before the initiative, cereals that were advertised to children might have had as much as 16 grams of sugar per serving. Now the maximum that anyone could have is 12 grams of sugar per serving. In fact, more of the cereals have less. So that’s a big improvement right there.”

And Kolish says advertising can actually help to get kids to eat healthier. For example, the McDonalds happy meal. Instead of offering kids French fries and a soft drink, the default happy meal now includes skim milk and apples – although it includes a side of caramel dipping sauce.

“I think now because of Burger King and McDonalds, alone, there’s probably more fruit advertising than ever before…and the sales and the trend data is really good. McDonalds has sold over 100-million orders of apple dippers in the last two years. That’s a lot of apples.”

But recent surveys at the University of Arizona and at Yale show that TV and online marketing toward children is still for foods that are not healthy for children. It’s mostly for things that are high in sugar, fat and salt.

Mary Engle is Associate Director for Advertising at the FTC. She says, for the most part, food companies have been taking foods that are bad for kids and only managing to make them less unhealthy.

“Whereas the proposal that the government group came up with is to only allow the marketing of truly healthful foods to children – foods that actually make a positive contribution to a healthy diet. So it’s much more limited which kinds of foods could be marketed to kids.”

Some food makers call the government proposal extreme. But government officials say they wouldn’t ban all ads – just those that encourage kids to eat bad food.

For The Environment Report, I’m Julie Grant.

Related Links

Part 1: Regulating Sweet Foods

  • Researchers say science is starting to show that people can become addicted to sugar, fat and salt. (Photo courtesy of the National Cancer Institute)

More people are becoming concerned
about the growing problems of obesity
and diabetes. Some even compare
foods that contribute to these health
problems to nicotine and tobacco. In
the first part of our series on food and
health, Julie Grant reports on efforts
to regulate foods that are bad for you
in the same way as cigarettes:

Transcript

More people are becoming concerned
about the growing problems of obesity
and diabetes. Some even compare
foods that contribute to these health
problems to nicotine and tobacco. In
the first part of our series on food and
health, Julie Grant reports on efforts
to regulate foods that are bad for you
in the same way as cigarettes:

Yale University professor Kelly Brownell has been watching for a long time as Americans gain weight. He says obesity and diabetes are creating debilitating health problems. And the food industry is largely to blame.

Brownell says science is starting to show that people can become addicted to sugar, fat and salt: the same stuff that’s in most processed foods.

“Certain parts of the brain get activated by food constituents, particularly sugar, that look like the same activation that occurs with heavily addictive substances like nicotine, alcohol or morphine.”


Brownell says the science is not definitive at this point. And he doesn’t expect it will ever show that donuts are as addictive as cigarettes. But he expects something similar. And so, he’s advocating that society treat these treats the same way as cigarettes: tax them. And put the money toward prevention programs.

Brownell is specifically pushing for a tax on sugary drinks. He says this approach worked for smokes, so why not soda pop.

“Oh, there’s no question about it. The rate of people smoking in the United States is about half of what it was in the 1950s and 60s. And that’s attributable to a number of things. But economists have figured that the taxes were the single most effective contributor to that.”

Brownell says California has held hearings on the idea, the New York state legislature is considering a tax on sugary drinks, and New Hampshire has just introduced legislation. And he says that’s just the tip of the iceberg. More sugar taxes are on the way.

We tried to reach the food industry’s major trade group: the grocery manufacturers association to comment for this story – but they didn’t respond. We also didn’t hear back from General Mills – a company that recently announced plans to lower the sugar content in its cereals.

We did speak with John Feldman. He’s an attorney who represents some of the major food manufacturers. He says they make foods that have salt, fat and sugar because people like them.

“There are products that people want to buy because they taste good or they are fun or they are attractive, of course. If they didn’t sell, people wouldn’t make ‘em.”

Feldman says any laws limiting or taxing certain foods must be based on scientific evidence: facts that show the foods are causing health problems. He says science hasn’t proven that with sugar, salt and fat.

Consumers at one Ohio supermarket also want sugary drink tax idea to fizzle out. College student Alicia Cobb is looking at the sweetened teas. She says beverages are only one of the reasons Americans are overweight.

“Well, so is McDonalds and Burger King and not working out and being a lazy bum.”

“How they think people supposed to live, taxing everything?”

Marie Holloway has a 12-pack of ginger ale in her cart. She says she’s not supposed to have sugar – because her doctor is concerned she’s developing diabetes.

“I only get a small income. By the time my doctor takes all of my money for copayments and doctor bills and stuff then I don’t have anything left because they’ve taxed everything so high. I think it’s terrible.”

Some TV pundits call the soda tax part of the Obama nanny state – telling people what’s good for them and limiting their choices. But those who support the sugar beverage tax say it doesn’t take away choice: it just helps people break what might be an addictive habit. One that’s costing everyone lots of money in health care costs.

For The Environment Report, I’m Julie Grant.

Related Links

Heart Health and Family Environment

  • Debbie Joy, a participant in the University of Ottawa Heart Institute's prevention program for family members. (Photo by Karen Kelly)

Every year, more than one million
Americans have a heart attack.
The majority survive, thanks
in part to advances in modern
medicine. But Karen Kelly reports
on a program that’s shifting
its focus from miraculous cures
to persuasion – getting the family
of patients with heart disease
to change the ways they live:

Transcript

Every year, more than one million
Americans have a heart attack.
The majority survive, thanks
in part to advances in modern
medicine. But Karen Kelly reports
on a program that’s shifting
its focus from miraculous cures
to persuasion – getting the family
of patients with heart disease
to change the ways they live:

(sound of aerobics class)

It’s a frigid January night in Ottawa, Canada. Most people are curled up on the couch. Debbie Joy is doing push-ups, lifting weights, even hula-hooping.

“After long day – I get up at 5:30, I get to the office at 7:30, I don’t leave there until 4:30, quarter to five. It takes a lot for me to go out and exercise. You just have to be motivated and do it.”

A couple of years ago, Joy didn’t have that motivation. But she did worry.
Both of her parents had died young of heart disease and, in the back of her mind, she knew what she should be doing to take care of herself.

Then she saw an article about a study at the University of Ottawa Heart Institute for the family members of current and former patients.
Bob Reid is directing the study.

He says research has found that family members of patients have a 30 percent chance of contracting heart disease themselves within 10 years.
But there’s been very little focus on this group.
Reid says he and his colleagues realized that if they wanted to focus on prevention, they had a major high-risk group already coming through the door.

“I think anybody who’s practiced in a hospital for any length of time recognizes that sometimes our patients of tomorrow are the family members of our patients today. Families tend to have very similar smoking habits, very similar eating habits, very similar activity habits. This really is a group that can benefit from fairly close attention.”

Close attention is the key to the heart institute’s program.
Family members work with a dietician, a nurse, and personal trainers to set up a new lifestyle. Then, they keep working with them.
Participants keep close track of exercise and their diet. The professionals track blood lipids, weight, and cholesterol levels.

Debbie Joy says it worked.

“The fact that you were watched, you were called every week, it made you follow the program. Then they got you into a routine. So they called you every week for 6 months, then it was dropped to once a month. At that point, you were in a routine and it was easier to follow.”


After three months, Joy’s weight and cholesterol levels dropped – and stayed there. One year later, she’s still exercising four days a week and eating well. It’s a part of her life now – she’s made friends at the gym and her family has adjusted to her new cooking methods.

The ultimate goal for the heart institute is to demonstrate that this works, and to justify funding the family prevention programs full-time.

The ultimate goal for Debbie Joy is quite simply, to live longer.

“You know, I have two kids and I want to be around for my grandchildren. So, it’s never too late.”

For The Environment Report, I’m Karen Kelly.

Related Links

Heavy Metal in Toy Jewelry

  • A nugget of cadmium. (Photo courtesy of the US Dept. of Interior)

The Consumer Product Safety
Commission has been working
to get lead out of kids’ toys.
Now, the government agency
is trying to determine whether
it can do anything about another
toxic chemical found in toys –
a heavy metal called cadmium.
Mark Brush has more:

Transcript

The Consumer Product Safety
Commission has been working
to get lead out of kids’ toys.
Now, the government agency
is trying to determine whether
it can do anything about another
toxic chemical found in toys –
a heavy metal called cadmium.
Mark Brush has more:

The Consumer Product Safety Commission is reacting to a report by the Associated Press that found 12% of children’s jewelry had high levels of cadmium. Some of the pieces tested were almost completely made of cadmium. The heavy metal can cause kidney disease and it’s known to cause cancer.

Scott Wolfson is with the Consumer Product Safety Commission. He says that because of all the problems with lead in toy jewelry – the bottom line is that parents should just stay away.

“Over the past four years, we have done more than 50 recalls of more than 180 million units of jewelry. That’s astounding. It reached a point, where CPSC has been recommending to parents that they stop buying children’s metal jewelry for the youngest of kids.”

And some experts say – if you’ve got old toy jewelry in the house – it’s probably a good idea to get rid of it.

For The Environment Report, I’m Mark Brush.

Related Links

Cleaning Up Dioxin

  • West Michigan Park lies along the Tittabawassee River. Large swaths of its soil was removed and re-sodded due to dioxin contamination. The removal was part of a US EPA effort to have Dow clean up several hot spots in the rivershed. (Photo by Shawn Allee)

One thing we hear over and over
from the Obama Administration
is that when it comes to the
environment, science should set
the agenda. Right now, though,
the chemical industry is accusing
the administration of abandoning
that idea. Shawn Allee reports it has to do with the science
behind a potent toxin:

Transcript

One thing we hear over and over
from the Obama Administration
is that when it comes to the
environment, science should set
the agenda. Right now, though,
the chemical industry is accusing
the administration of abandoning
that idea. Shawn Allee reports it has to do with the science
behind a potent toxin:

President George W. Bush took it on the chin when it came to the environment. One accusation is that he ignored science that suggested we should get tougher on green house gas emissions.

President Obama’s Administrator at the US Environmental Protection Agency is Lisa Jackson. She said things would be different.

“On my first day, I sent a memo to every EPA employee stating that our path would be guided by the best science and by the rule of law, and that every action we took would be subject to unparalleled transparency.”

It hasn’t taken long for the chemical industry to say Obama’s Administration is back-tracking.

“There’s been this notion to get things done, and it get it done fast.”

That’s David Fischer, an attorney for the American Chemistry Council. Fischer’s concerned about new standards on dioxins.

Dioxins are by-products from producing chemicals. They also get into the environment from burning trash and wood.

The government says dioxin causes cancer and reproductive and developmental diseases.

It’s known this for decades, but it’s been finishing a report to show exactly how toxic dioxins are. It’s been writing this dioxin reassessment for 18 years, and it was supposed to put out a draft last week.

But it didn’t do that, and it hasn’t said when it will.

That didn’t stop the EPA from proposing a new rule about how much dioxin should be allowed in the soil in peoples’ yards.

Fischer says that rule should wait.

“If they’re going to base goals based on the best available science, and they have, in fact, stated they plan to, it’s hard to imagine how you can do that before the reassessment’s finished because that does after all represent or should represent the best available science.”

The chemical industry’s concerned because dozens of sites across the country are contaminated with dioxins. And the rule would lower the amount of dioxin allowed in residential soil. It would go from 1000 parts per trillion to 72 parts per trillion – that’s a drop of more than 90%.

Fischer says that could cost companies millions of dollars in extra clean-up costs.

“Again, that begs the question, Why?”

One accusation is that the Obama administration wanted to finalize dioxin soil regulations in time to coincide with controversial, on-going dioxin clean-ups, such as one in central Michigan.

The EPA didn’t answer this question directly and wouldn’t provide an interview in time for this report. But it did say it’s got sound science to justify the proposed dioxin soil rule.

You might ask why this matters. Well, just look at central Michigan, where there’s a large, on-going dioxin cleanup.

Linda Dykema works with Michigan’s Department of Community Health. She creates state standards on how much dioxin should be allowed in water, fish, and soil. To protect people in Michigan, she needs help from the EPA.

“We rely a great deal on federal agencies to provide us with some hazard assessment for chemicals. The ability of the state to public health staff to do those kinds of assessments is pretty limited. They can do what needs to be done and what we can’t do here at the state.”

And a ruling on dioxin levels in soil should help Dykema. But this move by the EPA might cause more problems than it solves. For years, the chemical industry’s argued that the science behind dioxin isn’t complete.

This proposed soil rule gives the chemical industry another chance to say, ‘here we go again.’ And the justification it needs to keep fighting a rule the EPA insists protects people’s health.

For The Environment Report, I’m Shawn Allee.

Related Links

Unusual Lead Poisoning Case

  • Most US communities have low rates of childhood lead poisoning - averaging 1.2% of the total population. But with the new influx of Burmese immigrants, Fort Wayne’s exposure rate rose to 12%. (Photo by Erika Celeste)

Lead was banned from paint in
1978. And it was taken out of
gasoline a few years later. So
with less lead in the environment,
the problem of lead poisoning in
kids has been decreasing. But
every once in a while, health officials
find a dramatic spike in the number
of lead poisoning cases, and the race
is on to find the source. Erika Celeste reports on the poisoning
of some Burmese refugees:

Transcript

Lead was banned from paint in
1978. And it was taken out of
gasoline a few years later. So
with less lead in the environment,
the problem of lead poisoning in
kids has been decreasing. But
every once in a while, health officials
find a dramatic spike in the number
of lead poisoning cases, and the race
is on to find the source. Erika Celeste reports on the poisoning
of some Burmese refugees:

Three years ago, Mah We took her baby daughter and fled the unrest in Burma to Fort Wayne, Indiana. It’s the largest Burmese settlement outside of their home country. They wanted their new daughter to have an American name. They settled on Snow White after seeing some the Disney movie.

She is now three and a half years old.

Celeste: Hi, Do you like school?

Snow White: “School, yes.”

Celeste: “What’s your favorite thing at school?”

Translator: “Play with my friends.”

Snow White has had a lot of challenges in her young life. Blood tests revealed Snow White had lead poisoning. Exposure to lead can cause brain damage, I-Q loss, behavioral problems, and in rare cases, death.

Most US communities have low rates of childhood lead poisoning – averaging 1.2% of the total population. But with the new influx of Burmese immigrants, Fort Wayne’s exposure rate rose to 12%.

Amy Hastings is with the Allen County Health Department:

“We kind of assumed they had been poisoned when they were in the camps, and it just wasn’t identified until they got to the United States and so we conducted it like a normal lead investigation and found no lead hazards.”

But then new siblings were born into some of the Burmese families. At birth, the babies’ blood levels were normal, yet within a few months those levels became dangerously high.

Most small children get poisoned when they crawl on the floor, get dust from old lead paint on their hands, and then stick their hands in their mouths.

“The babies weren’t old enough to do that yet, and so why they had a blood lead level of in the 20s, made no sense to us.”

With the cases mounting and the source still unknown, the Centers for Disease Control helped Hastings assemble an investigative team. They set up a make shift field office and went door to door in the Burmese apartment complexes.

“We were hunting around for anything we could find that these kids might be getting into. We tested food, we tested toys, anything we thought that babies could have come into contact with.”

They tested more kids. And took samples of various household items. Then a break came in the case. Two homemade Burmese medicines – daw tway and daw kyin— geared specifically to small children for tummy aches came back with extremely high levels of lead.

Hastings was relieved to finally have an answer. But it didn’t solve the problem.

Aye Ma is a Burmese translator. She says many parents didn’t believe Hastings are her team.

“The mother was pretty upset. She referred back to her ancestors, ‘oh my ancestors have been using this medicine and how can you come and out of the blue tell me this is no good and it has lead in it?’”

While some families are taking the advice to stop using the medicine, others are still skeptical. The medicines are banned in the US. But they can still get a hold of them through family connections back home.

Hastings says she’s still seeing new cases of lead poisoning. But because she isn’t certain the medicines are the only cause, educating the families about lead poisoning remains important.

Officials have set up a pilot preschool program for kids like Snow White. The program will help the kids catch up through, speech, cognitive, and nutrition therapy. So far it seems to be a great success.

(sound of kids playing)

While this was an unusual case for the US, the CDC reports that many traditional medicines from East Indian, Middle Eastern, Western Asian, and Hispanic cultures still contain lead.

For The Environment Report, I’m Erika Celeste.

Related Links

Chicken Surprise at Stores

  • Consumer Reports bought whole chickens from 100 different stores to test for their study. (Photo courtesy of the USDA)

A Consumer Reports study finds
most of the chickens bought at
the grocery store are contaminated
with bacteria that can cause you
to get sick. Lester Graham reports:

Transcript

A Consumer Reports study finds
most of the chickens bought at
the grocery store are contaminated
with bacteria that can cause you
to get sick. Lester Graham reports:

Consumer Reports bought whole chickens from 100 different stores.

Dr. Urvashi Rangan says they tested them for two different strains of bacteria.

“Salmonella and campylobacter infections can give people serious diarhea, abdominal cramping for sometimes days, even weeks at a time.”

Two-thirds of the chickens they tested were tainted.

Rangan says the U.S. government’s guidelines are pretty loose for the chicken processors.

“Each company is basically allowed to script their own hygeine plan. And, clearly, there aren’t enough standards or standardidization among them that has allowed them to achieve a decent rate of cleanliness.”

The chickens that were cleanest were organic air-chilled chickens. The Consumer Report’s study is available online and will be published in the January issue of the magazine.

For The Environment Report, I’m Lester Graham.

Related Links

Waiting for the FDA to Rule on BPA

  • The chemical Bisphenol-A, or BPA, is found in some plastic food packaging and the inside of most tin-cans. (Photo courtesy of the National Cancer Institute)

The government missed a deadline to
declare whether a chemical in food
packaging is safe. Shawn Allee reports critics are growing
tired of the delay:

Transcript

The government missed a deadline to
declare whether a chemical in food
packaging is safe. Shawn Allee reports critics are growing
tired of the delay:

The chemical is Bisphenol-A, or BPA. It’s found in some plastic food packaging and the inside of most tin-cans.

The US Food and Drug Administration is reviewing whether BPA causes developmental diseases and some cancers. The agency missed a deadline of November 30th, and some groups are getting impatient.

Sarah Jennsen is with the Natural Resources Defense Council. She says while the Food and Drug Administration deliberates, more studies are coming out against BPA.

“We’ve had studies now published that show toddlers exposed to BPA behave diffrently from toddlers who are not exposed, and so this human research which is being published is very concerning because it’s replicating what we’ve already seen in the animal studies.

The Food and Drug Administration won’t say which studies it’s including in its scientific review of BPA or when it will finish.

For The Environment Report, I’m Shawn Allee.

Related Links

Scavengers in Dire Straights

  • Vultures can eat 20% of their own body weight in one sitting. And they have digestive systems with special acids that will dissolve toxic bacteria and viruses. (Photo courtesy of the National Park Service)

For most people, the slow spiral
of airborne vultures means that
some unlucky animal has died. Now,
in some regions of the world, vulture
populations are dying. An American
scientist is part of an international
effort to save these massive scavengers.
Ann Murray has the story:

Transcript

For most people, the slow spiral
of airborne vultures means that
some unlucky animal has died. Now,
in some regions of the world, vulture
populations are dying. An American
scientist is part of an international
effort to save these massive scavengers.
Ann Murray has the story:

It’s hard to get too excited about an ugly bird that eats dead, rotting flesh. Let’s face it, vultures don’t have a good rep. But vultures are amazing animals. They can eat 20% of their own body weight in one sitting. And they have digestive systems with special acids that will dissolve toxic bacteria and viruses. Meaning, vultures prevent the spread of killer diseases like rabies and anthrax when they scarf down the carcasses of sick animals.

“With the meat goes the disease.”

That’s Todd Katzner, Director of Conservation and Field Research at the National Aviary in Pittsburgh. Katzner says, sadly, with all the good vultures do, many species are in big trouble.

“Vultures are in dire conservation straits in much of the world because of things like habitat loss, poisoning and now these new problems like diclofenac.”

Diclofenac is a medicine given to sick livestock in central Asia. Vultures that eat livestock carcasses with traces of the drug almost always die of immediate kidney failure. It took scientists some time to figure that out. Katzner’s friend Vibhu Prakash, an Indian ornithologist, recognized the beginnings of this vulture die-off.

“This was almost 20 years ago that Vibhu started seeing vultures near Barrackpore, India. They were sitting in a tree with their heads hanging down .Eventually they’d just fall out of the tree and die on the ground.”

Since then, Indian white-backed vulture numbers have plummeted from 30 or 40 million birds to just thousands. This massive decline has left scientists scratching their heads about how many vultures are left in central and south Asia and other parts of the world. Because vultures move around a lot, it’s been hard to keep track of individuals. There’s never been an accurate total population count – anywhere. That’s where Katzner and the National Aviary come in.

For several years, Katzner and his field team have been traveling to mountainous grazing lands in Kazakhstan and the northern plains in Cambodia . Katzner says the one place vultures reliably congregate is at feeding sites.

“We ask people if any livestock have died .We drive up to those sites . Usually the vultures have been there. When vultures feed on the carcass they leave feathers everywhere. And when we go to the carcass, we’re able to pick up sometimes 500 or 1000 feathers.”

Once the feathers are collected, Katzner’s team extracts DNA from them to identify individual birds. The scientists will use this information to create population models. This new counting method is faster and more reliable than capturing, marking and recapturing birds.

Katzner expects researchers will use his feather- based system to count endangered vultures in other places. That includes here, in the United States, where California Condors are dying from lead poisoning.

(sound of a vulture eating)

Before I leave the Aviary, Katzner points out an American black vulture. She’s gobbling a breakfast of chick pieces and mice. Katzner hopes his work will help to keep other vultures happy and hungry. He says we all need ‘em on the job as nature’s cleanup crew.

For The Environment Report, I’m Ann Murray

Related Links