eBIRD HELPS VACATIONERS TRACK BIRDS

Bird watching continues to be a popular hobby. Now a recently upgraded website can help people track where the birds are.
The GLRC’s Chuck Quirmbach reports:

Transcript

Bird watching continues to be a popular hobby. Now a recently upgraded
website can help people track where the birds are. The GLRC’s Chuck
Quirmbach reports.


Cornell University and the National Audubon Society have set a website
called eBird.org. The site has compiled years of observations
from amateur birdwatchers across North America. Chris Wood is Cornell’s
eBird project manager. He says the site could help people who want to
see birds while traveling.


“If you’re planning to take to a trip really anywhere in the U.S. or
Mexico, you can use eBird. There’s a tab that says view and explore
data and you can get a bar chart to show the distribution of birds that
have been seen there.”


Wood says having all the data in one place can also help scientists as
they try to learn more about bird migration patterns. He says nowadays
that could be useful in the effort to block the spread of avian flu.


For the GLRC, I’m Chuck Quirmbach.

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Cities Take Aim at Roosting Crows

  • Crows are roosting in huge groups in cities all over the country. The USDA is trying to find ways to get them to go back to their natural habitat. (Photo by Paige Foster)

Flocks of crows are nothing new in most cities. In the fall and winter months, crows forage for food during the day and roost in city trees at night. The birds like cities because they’re safe and comfortable. The residents generally don’t like the crows, though. The Great Lakes Radio Consortium’s Skye Rohde
reports:

Transcript

Flocks of crows are nothing new in most cities. In the fall and winter months, crows forage for food during the day and roost in city trees at night. The birds like cities because they’re safe and comfortable. The residents generally don’t like the crows, though. The Great Lakes Radio Consortium’s Skye Rohde reports:


(sound of crows)


There are a lot of crows here. About 63,000 of them are in the city. The trees are thick with them. At dawn and dusk, so is the sky. Bird feces coats city sidewalks and parked cars. Amy Emedon lives in town. She’s used to the crows.


“They make a lot of noise at night, or in the morning they kind of wake you up. But other than that, they don’t really bother me that much. They’re kind of gross, because their poop’s all over the place and they’re so loud and there’s so many of them. Like sometimes you can’t even see, like, the sky. It reminds me of that movie ‘The Birds.'”


Crows have been wintering in Auburn, New York for more than 100 years. Written records from as early as 1911 describe a very large roost downtown. Auburn has the largest crow roost in the state. This winter, city officials hired the U.S. Department of Agriculture to haze the crows.


(sound of distress calls and pyrotechnics)


Hazing means the eight USDA scientists drive around town using recorded crow distress calls, pyrotechnics and laser pointers – anything that will upset the birds and drive them out. Sometimes this includes shooting the birds, but not in New York state. Richard Chipman is the New York state director of the USDA’s wildlife services project. He says the idea is to move the birds to a more “natural” habitat.


“The goal is not to just relocate these birds and cause somebody else problems. The goal is to try to relocate them to a low-impact area to improve the quality of life of folks here in the city.”


The only problem with this plan is that the crows really like being in cities. The birds are smart. They’re communal. They recognize that they’re safer downtown than out-of-town. Kevin Mcgowan is an ornithologist at Cornell University who has studied crows for 16 years. He’s heard of large crow roosts in cities across the nation, ranging from 100 birds to two million. Mcgowan says it’s usually warmer in cities. Crows like that. And they like the big trees and streetlights.


“I think the lights is a big deal. Crows are scared of things that go bump in the night because those things eat them. And that’s pretty much great horned owls, okay? Great horned owl is probably the single scariest thing to a crow, because they come in at night when crows can’t see and owls can. And owls eat a lot of crows.”


Mcgowan says crows started settling in U.S. cities in much larger numbers in the 1970s and 1980s, after a change to the Federal Migratory Bird Treaty Act.


“In – I believe it was 1972 – there was an amendment to the act that afforded crows protection for the first time. What that meant was now you couldn’t just shoot crows anytime you wanted to. You had to do it under the direction of a state hunting season, which had regulations.”


As a result, people changed their behavior. They didn’t shoot crows as much, so the crows became less scared of them and moved closer. In other words, crows have realized that cities are safer habitats than their “natural” environment. Mcgowan says he’s seen it before.


“You have a big predator that scares away the smaller predator that’s the one that really bothers you, then it behooves you to hang around the big predator. Happens all the time around people. There are lots of things that come in to be around people because they’re relatively safe there.”


Whether the USDA can break that pattern in cities like Auburn remains to be seen. Scientists have surveyed this city and harrassed the remaining crows. But they might have to return next winter to do the same thing again. And Auburn officials, like those in other crow-filled cities, might need to consider changing those things that attract crows in the first place, rather than just focusing on scaring the birds away.


For the Great Lakes Radio Consortium, this is Skye Rohde.

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Birders Keep an Eye Out for Vagrants

  • Some hummingbirds have been showing up in places where they're not normally found. Cornell University is trying to recruit birders to help them collect sightings of birds outside their range. (Photo courtesy of the U.S. Fish and Wildlife Service)

Bird lovers nationwide are being asked to report “vagrants” in their neighborhoods. The Great Lakes Radio Consortium’s Erin Toner explains:

Transcript

Bird lovers nationwide are being asked to report “vagrants” in their neighborhoods. The Great Lakes Radio Consortium’s Erin Toner explains:


Bird researchers at Cornell University have a special request this winter: they’re asking their nationwide network of bird watchers to report vagrants – birds that show up in places they’re not normally found. David Bonter is head of Project FeederWatch at Cornell.


He says birds that drift outside their normal range can indicate a natural shift in bird distribution or it could be a sign there’s a problem with the species. Bonter says in recent years, there have been a lot of reports of hummingbirds that breed west of the Rocky Mountains showing up at feeders in the Southeast and Midwest.


“These are birds that, historically, have never been in Eastern North America and they’re showing up here at feeders in the winter time, when historically, they’d be wintering in Mexico or points south.”


Bonter says calls bird vagrancy a biological dead end, because most don’t find mates in their new environment.


For the Great Lakes Radio Consortium, I’m Erin Toner.

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Summer Battle Plans for Aquatic Plant

Now that spring is here, aquatic plants are beginning to flourish. The Great Lakes Radio Consortium’s Ashley McGovern has an update on the battle against the Eurasian watermilfoil:

Transcript

Now that spring is here, aquatic plants are beginning to flourish. The
Great Lakes Radio Consortium’s Ashley McGovern has an update on the battle against the
Eurasian watermilfoil:


The Eurasian watermilfoil originated in Europe and Asia and has been found in the US for more
than 80 years. Watermilfoil can be transferred from lake to lake by boaters. The plant can hinder
recreational activities, like swimming and fishing, and can harm native ecosystems.


Lake associations and ecologists are trying to find ways to stop the spread of this invasive plant.
Bernd Blossey is an ecologist with Cornell University. He says people use different tactics to try to
get rid of watermilfoil.


“Some people promote using aquatic herbicides but that’s never a long-term solution—the plant
simply comes back.”


Another technique used is called biological control. That’s introducing natural enemies, such as
insects, that feed on the plant.


“Biological control doesn’t try to eradicate a plant, it just tries to reduce it’s population level.”


Blossey says it’s important to increase awareness of invasive species like watermilfoil and to keep
in mind that using herbicides is just a temporary solution to a tough problem.


For the Great Lakes Radio Consortium, I’m Ashley McGovern.

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The Debate Over a Corn-Based Hydrogen Economy

  • Researchers are looking at ethanol from corn as an environmentally-friendly way to power fuel cells. However, some studies show corn-based ethanol takes more energy to produce than the fuel provides. (Photo by Lester Graham)

Researchers are looking at ways to use corn-based ethanol as a way to power hydrogen fuel cells. It would appear to be an environmentally friendly way to get into the hydrogen fuel economy. However, ethanol might not be as environmentally friendly as its proponents claim. Backed by the farm lobby and ag industries such as Archer Daniels Midland, ethanol has plenty of political support. But some researchers say corn-based ethanol is a boondoggle. The Great Lakes Radio Consortium’s Mary Stucky reports:

Transcript

Researchers are looking at ways to use corn-based ethanol as a way to power hydrogen fuel cells.
It would appear to be an environmentally friendly way to get into the hydrogen fuel economy.
However, ethanol might not be as environmentally friendly as its proponents claim. Back by the
farm lobby and ag industry such as Archer Daniels Midland, ethanol has plenty of political
support. But some researchers say corn-based ethanol is a boondoggle. The Great Lakes Radio
Consortium’s Mary Stucky reports…


This reactor is in a laboratory at the University of Minnesota ticking as it converts ethanol into
hydrogen. Researchers here envision thousands of these inexpensive reactors in communities
across America using ethanol to create hydrogen, which would then be used in fuel cells to
generate electricity.


Lanny Schmidt, a Professor of Chemical Engineering, directs the team that created the reactor.


“We’re not claiming our process is the cure-all for the energy crisis or anything like that. But it’s
a potential step along the way. It makes a suggestion of a possible way to go.”


Hydrogen is usually extracted from fossil fuels in dirtier and more costly refineries.


Schmidt says it’s much better to make hydrogen from ethanol.


“It right now looks like probably the most promising liquid non-toxic energy carrier we can think
of if you want renewable fuels.”


Not so fast, says David Pimentel, an agricultural scientist at Cornell University. For years,
Pimentel has warned about what he calls the cost and efficiency and boondoggle of ethanol.
Pimentel says ethanol is a losing proposition.


“It takes 30-percent more energy, including oil and natural gas, primary those two resources to
produce ethanol. That means importing both oil and natural gas because we do not have a
sufficient amount of either one.”


Pimentel says most research on ethanol fails to account for all the energy needed to make the fuel,
such as energy used to make the tractors and irrigate crops. Adding insult to injury, says
Pimentel, ethanol relies on huge government subsidies going to farmers and agri-business.


“If ethanol is such a great fuel source, why are we subsidizing it with 2-billion dollars annually?
There’s big money, as you well know, and there’s politics involved. And the big money is leaking
some of that 2-billion dollars in subsidies to the politicians and good science, sound science,
cannot compete with big money and politics.”


Pimentel also points to environmental damage of growing corn – soil erosion, water pollution
from nitrogen fertilizer and air pollution associated with facilities that make ethanol. But
Pimentel has his detractors.


David Morris runs the Institute for Local Self Reliance in Minneapolis. Morris is not a scientist,
but he commissioned a study on ethanol. He says Pimentel relies on out-of-date figures and fails
to account for the fact that ethanol production is getting more efficient.


Morris’ findings – a gallon of ethanol contains more than twice the energy needed to produce it.
As for subsidies…


“There’s no doubt that if we did not provide a subsidy for ethanol it would not be competitive
with gasoline. But what we need to understand is that we also subsidize gasoline, and if you took
the percentage of the Pentagon budget, which is spent directly on maintaining access to Middle-
Eastern oil, and impose that at the pump, it would add 25- to 50-cents a gallon. At that point,
ethanol is competitive, under the assumption that you will not need a large military budget to
protect our access to Iowa corn.”


But more efficient than making ethanol from corn might be grass, or even weeds. David Morris
says that’s because you don’t have fertilize or irrigate those kinds of plants, the way you do corn.


“So if we’re talking about ethanol as a primary fuel to truly displace gasoline, we have to talk
about a more abundant feedstock. So instead of the corn kernel, it become the corn stock, or it
becomes fast-growing grasses, or it becomes trees, or sawdust or organic garbage. And then
you’re really talking about a carbohydrate economy.”


Pimentel scoffs at that idea.


“You’ve got the grind that material up, and then to release the sugars, you’ve got to use an acid,
and the yield is not as high. In fact, it would be 60-percent more energy using wood or grass
materials.”


While scientists and policy people debate whether ethanol is efficient or not, Lanny Schmidt and
his team soldier on in the lab undeterred in their efforts to use ethanol for fuel. Schmidt
understands some of Pimentels’s concerns, but he thinks scientists will find an answer, so ethanol
can be used efficiency enough to help power the new hydrogen economy.


For the Great Lakes Radio Consortium, I’m Mary Stucky in Minneapolis, Minnesota.

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City Pollution Hurts Rural Trees

A recently published study indicates that trees in cities are growing better than trees in rural areas downwind of the cities. The Great Lakes Radio Consortium’s Lester Graham has more:

Transcript

A recently published study indicates that trees in cities are growing better than trees in
rural areas downwind of the cities. The Great Lakes Radio Consortium’s Lester Graham
has more:


This study, published in the journal Nature, found that trees grown in many
different conditions grow twice as fast in the city than trees in the country. Jillian Gregg
at Cornell University is the lead author of the study. She says lots of factors affected the
trees…


“But, in the end, the most important factor was ground level ozone which was higher in
rural environments.”


Ground level ozone develops when pollution in the city stews in the sun for a while. As
the chemicals drift out of the city, ozone develops downwind in the rural areas where the
impact on the trees is greater.


“So, in the rural environments, the ozone stays around for longer so you have a longer
exposure period.”



During three growing seasons at eight sites in eleven different types of soils, the results
were the same. The city trees did much better than the trees in the country exposed to
ground level ozone longer.


For the Great Lakes Radio Consortium, this is Lester Graham.

Birders’ Passion Helps Scientists

  • Backyard birders across North America are helping scientists track the fate of our feathered friends. (Photo courtesy of USFWS)

Every year, tens of thousands of avid birdwatchers wander through frozen fields and marshy swamps. Their job is to record as many birds as they can find in a given area. For birders, it’s a day to enjoy the outdoors while doing what they love most. But as the Great Lakes Radio Consortium’s Karen Kelly reports, that passion serves another purpose – it helps scientists:

Transcript

Every year, tens of thousands of avid birdwatchers wander through
frozen fields and marshy swamps. Their job is to record as many birds
as they can find in a given area. For birders, it’s a day to enjoy the outdoors
while doing what they love most. But as the Great Lakes Radio Consortium’s
Karen Kelly reports, that passion serves another purpose – it helps scientists:


(sound of footsteps)


Georgina Doe: “There’s five robins right there and there’s three common mergansers,
males…”


Georgina Doe scans the shoreline with her binoculars. Within seconds,
she spots a tiny glimpse of a bird and names it.


She knows them by the way they dive in the air, and the way they thrust
their chests out.


Doe has been scanning the treetops of Carleton Place, Ontario for
more than 30 years. She says she loves the chase and the element of surprise.
And over the years, birding has also been her escape.


She remembers watching a robin build its nest when her grandson
was seriously ill.


“So I used to count the birds every morning before I went off to
the hospital. And then after that, you come back to reality. Somehow a
little bird can just make you feel better.”


Birds have been a part of all of our lives. We might not know their names.
But we can remember holding a baby chick. Or hearing a cardinal on a crisp cold day.


But now, many bird species are dwindling. And scientists are
counting on birders like Georgina Doe to help them find out why.


Doe is one of many birders in North America who collects
information for scientists. Jeff Wells works with that information
at Cornell University’s Lab of Ornithology.


“There’s no way that we could ever pay the tens of thousands of
trained biologists that would be necessary to gather this kind of
information. It’s only possible when we can engage volunteers like
we do in citizen science projects.”


Cornell runs at least a dozen programs that rely on information
from average birders.


There’s the Christmas Bird Count. About 50 thousand people participate.
Another 50 thousand track species during the Great Backyard Bird
Count in February.


The volunteers reported that wood thrushes are disappearing in
many areas. And they’re tracking the effect of the West Nile Virus
on bird populations.


“If a little bird dies, usually it just disappears quickly
and no one ever sees it. So we don’t really know the impact.
And so looking at the differences in the numbers and distribution
might give us some sense of when the disease was rampant in the summer,
whether it killed off enough birds to make a noticeable
difference in our count.”


(sound of quiet footsteps)


Robert Cermak: “You can see it’s about 10 inches high. It’s all fluffed
up right now so it’s
hard to get a sense of
its mass…”


Birder Robert Cermak tiptoes closer to a barred owl sitting in the
crook of a tree.


We’re in Ottawa, Canada’s capital and a city of about a million
people. When it comes to bird counts, this is Cermak’s territory.


“It’s not often that you actually see a barred owl, any owl, during
the day. They’re usually more secretive. This one is not too
afraid to be out so it’s probably become more accustomed to having people
around it, since this is the center of the city.”


Like Georgina Doe, Cermak has been birding for years. But even with
veterans, there’s always concern about their accuracy. Cermak
discovered this firsthand when he reported seeing a rare
harlequin duck last year.


“I sent it in and a few hours later, someone from Cornell –
very politely because it’s a delicate subject to question
someone’s sighting of a rare bird – but they very delicately
indicated that a harlequin duck is extremely unusual in Ontario and
could I please provide a few extra details.”


Cermak sent them a published account of the sighting. He also
gave them the number of a local expert.


Jeff Wells says researchers check their facts carefully. They look
for reports that don’t match others in the surrounding area. Sometimes
an investigation turns up a trained ornithologist… and sometimes not.
But overall, Wells says the information has formed the basis for
hundreds of published studies.


That’s something that makes birders like Robert Cermak and
Georgina Doe feel proud.


“It’s nice because you’re contributing. You’re doing a
lot of hours, it uses a lot of gas, you go around a lot of blocks doing this
kind of count
but we just think it’s important.”


(sound of Georgina Doe walking)


Georgina Doe says she doesn’t really think of herself as a
scientist.


But she’s out there every day, with her ear to the wind. And that’s
what the scientists are counting on.


For the Great Lakes Radio Consortium, I’m Karen Kelly.

Related Links

Unraveling Mystery of Birds’ Night Calls

  • Ornithologist Bill Evans has been tracking down avian night flight calls for 17 years.

Many North American birds are in serious decline. But scientists aren’t sure what’s wrong because birds are hard to count. The problem is partly that birds often migrate long distances between wintering sites and summer breeding grounds. Usually, they fly unobserved at night, and in many cases scientists don’t know what route they take. However, a new technique promises to solve this problem. The Great Lakes Radio Consortium’s Daniel Grossman has our story:

Transcript

Many North American birds are in serious decline. But scientists aren’t sure what’s wrong because birds are hard to count. The problem is partly that birds often migrate long distances between wintering sites and summer breeding grounds. Usually, they fly unobserved at night, and in many cases scientists don’t know what route they take. However, a new technique promises to solve this problem. The Great Lakes Radio Consortium’s Daniel Grossman has our story:

(Sound on dock, with Evan’s whispering out bird names fades up under intro.
Continues under Grossman track, then heard in clear.)

It’s a warm spring evening on the south Texas coast. Ornithologist Bill Evans sits on a dock, listening for birds.

“Grey-cheek thrush.”

Grossman: “That high one?”

“Yeah. (makes sound). Moor hen calling behind us on the ground. Oh sorry, that’s a black-necked stilt.”

Evans has been listening to and studying these night calls since he had an epiphany at a Minnesota campground in 1985. Then a recent college dropout and avid birder, Evans was adrift, unsure what to do with his life.

“I was getting back to a campsite about two in the morning and heard an incredible flight.”

Hundreds of birds were passing overhead in nocturnal migration, including what appeared to be about 100 black-billed cuckoos.

“If you go out and look for black-billed cuckoos during the day you may see two or three. And I’m thinking, ‘wow if I had a tape recorder and could somehow document this on audiotape, I might have a pretty powerful conservation document.'”

Bill Evans got a recorder and soon was making tapes of flight calls. But his recordings were of limited use because no one knew which birds made which sounds. The melodious tunes birds perform during the day are well known. But, according to Cornell Professor Charles Walcott, the calls they make during night flights are another matter.

“If you out on an evening and listen to these birds migrating overhead you’ll hear all these twitters, most of which don’t sound anything like what a normal bird sounds like at all.”

Walcott is the former director of the Cornell Ornithology Laboratory. He says night calls may help birds keep from colliding with each other. For decades, researchers hearing these calls were frustrated knowing there were birds in flight, but unable to determine which ones.

“And to be able to recognize individual species by their calls was a dream that many people have had. And Bill is the first one that’s been able to do it on any substantial scale.”

Evans spent the next 17 years prowling migration routes to match birds with their calls. Often his only chance came in the wee morning hours, when sometimes night migrants make a single night call before settling down to eat and rest. Gradually he cracked the code.

“The herons. Amazing squawks. Black-crowned-night heron is a sort of (makes sound). Green heron is a (makes sound). Barn owl. It’s a [makes sound]. Except it’s about ten times louder than that. The dickcissel is actually a sparrow and it’s got sort of a buzzy note (makes sound).

(Sound of truck door closing and truck starting up)

The small, colorful dickcissel is why Bill Evans is here, just north of Brownsville, Texas. He’s set up a network of 15 computerized monitoring stations that listen for dickcissels in flight. It’s the first large-scale effort to track birds using night calls. The network is stretched out along a line he believes these birds cross on their way between Venezuela and the U.S. plains.

Each station has a roof-mounted microphone, connected to a computer. Most of them are at high schools – their large, flat roofs and spacious grounds reduce traffic noise – and they’re generally in a science class. And while Evans does stay up late to listen for pleasure, it’s these computers that are actually doing the work. Each day he collects the past night’s results, in a marathon drive, station by station.

(Sound of high school PA System making announcement cross fades with truck under previous track. Also mixed in sound of crowded high school corridor with students changing classes. Cross-fades with sound of classroom.)

Evans: “Come on over guys. My name is Bill, this is Dan.”

Peter: “Bill and Dan?”

Evans: “What’s your name?”

Tate: “Tate.”

Peter: “Peter.”

Bill: “Nice to meet you guys.”

Some curious students pay Evans a visit at La Ferria High School.

(Evans fades up underneath Grossman. Then heard in clear.)

Evans (to students): “…So anyway the sound comes down this audio cable into this computer. We’re just checking the data from last night…”

(Computer keyboard sounds in actuality fades under track.)

The computer has a program that distinguishes the call of the dickcissel from other birdcalls and extraneous noise. The machine records the call, and saves a picture – or spectrogram – of it. Evans trouble shoots his stations and collects data daily. First he winnows out false positives, sounds that tricked the computer, by inspecting the spectrograms.

Evans (to students): “I’m going to set up one folder to put in the dickcissels’ calls and the other I’m going to put in the noise, the false detections. So now I’ve just classified the detections from last night. We had 28 here that we classified as dickcissels…”

After checking the computer and collecting its data the researcher says he has to run. Each of the 15 stations in his network needs a checkup because this weekend might be the climax of the dickcissel migration, bringing a huge flight of birds.

Evans (to students): “…And this weekend we think there are thousands of them just in Northeast Mexico. They’re going to take off. ‘Cause last year in one night, we had over 3,000 detected at McAllen High School…”

In the end, the big flock didn’t appear until the following week. Though the arrival was delayed for several days compared to the previous year, Evans now has proof that by monitoring night calls he can predict the timing and migration route of an individual bird species.

(Sound of truck door closing and truck starting up.)

Walcott: “It’s really an extraordinary accomplishment.”

Cornell professor Charles Walcott says the migration information Evans is discovering can’t be collected any other way. It’s all the more extraordinary because Bill Evans, who once worked for Walcott, has neither a college nor any other degree.

Walcott: “With Bill’s scheme you can now say, well, this was an evening when we had a huge migration of warblers and they were of the following species. And this is very useful and very interesting information. And it gives you a sense of where the migratory paths for each species of birds might be.”

It’s detailed information like this that conservation specialists need to design plans to protect the most threatened species. In the future Evans hopes several large-scale computer networks of the sort he’s testing in Texas will monitor many species throughout the United States. He hopes the listening posts could help solve the mystery of why so many North American species are in decline. This spring, in an important first step, Evans and collaborator Michael O’Brien released a compact disc with night flight calls of most eastern land birds. Now anyone can learn the secrets Bill Evans has unlocked.

For the Great Lakes Radio Consortium, this is Daniel Grossman.

Related Links

Cockroach Contraceptive

If you’ve ever had cockroaches, you know how hard it is to get rid
of them. Many people turn to exterminators or pesticide sprays. But
often, roach-killing products are made with neurotoxins that may be
harmful to pets and humans. Now, some scientists have come up with a
different approach: a kind of birth control… for cockroaches. The
Great
Lakes Radio Consortium’s Wendy Nelson explains:

Vets Work to Reduce Euthanasia

Estimates are, as many as six million cats and dogs are euthanized
each year. In the past, humane societies and other groups have fought
to
reduce those numbers. But as the Great Lakes Radio Consortium’s
Wendy Nelson reports, now some future veterinarians are learning about
the problem… and the role they can play in helping to prevent it: