Should
People Kill One Animal to Save Another?
Since ancient times, owls have been
called many things, such as mysterious. These birds can be found in many parts
of the world. And today, one kind of owl is causing a problem in forests of the
northwestern United States.
Barred owls are a large species native to eastern North America, but they began moving west at the start of the 20th century. By 1973, large numbers of barred owls had arrived in the western state of Washington. Later they moved south into Oregon and California.
Barred owls are a large species native to eastern North America, but they began moving west at the start of the 20th century. By 1973, large numbers of barred owls had arrived in the western state of Washington. Later they moved south into Oregon and California.
In parts of the Pacific Northwest, the owls are now
believed to be causing a drop in the population of a smaller, less aggressive
bird: the northern spotted owl.
In many ways, the barred owl is the spotted owl’s worst enemy. The
barred owl has more babies per year and eats the same animals, like squirrels
and wood rats. And their numbers are now larger in many parts of the spotted
owl’s traditional territory.
David Wiens is a biologist with the U.S.
Geological Survey, a federal agency that studies the Earth and its natural
resources. He and other officials are doing something unusual to protect
spotted owls: killing barred owls.
It is a controversial,
experimental program. More than 2,400 barred owls have already been shot.
Wiens is the son of a well-known bird expert and grew
up with a fascination for birds. He has mixed
feelings about the program.
“It’s a little distasteful, I think, to go out killing
owls to save another owl species,” he says. But he adds, “We knew that barred
owls were outcompeting spotted owls and their numbers were growing too
fast."
To catch barred owls, officials put
digital bird callers on the ground. Then they step back and wait as several
sounds from the devices fill the air. All of this happens in the dark of night.
Barred owls dislike other birds in their territory, so
they will fly down and chase other owls out. That is when Wiens and his team
try to shoot them.
The federal government has been trying
for years to save the northern spotted owl. Some years ago, this bird was at
the center of a huge battle over logging rights
across Washington, Oregon and California.
In 1990, the northern spotted owl was listed as
threatened under the Endangered Species Act, and appeared on the cover of Time magazine.
Then, officials suspended logging on millions of hectares of forests to protect
the bird. But the spotted owl population continued to fall.
During that time, researchers began to study another
threat: Larger, more aggressive barred owls were competing with spotted owls
for food and space and pushing them out of some areas.
Now comes this final effort to see whether the
government can save spotted owls.
The U.S. Fish and Wildlife Service
launched the experiment a few years ago. It has raised questions, such as: How
much is it possible to reverse a drop in
population that has been happening for years, caused in part by human activity?
And, as climate change continues to push species out and affect how and where
plants and animals live, how much should people get involved?
In four small study areas in Washington, Oregon and
California, Wiens and his team have been killing barred owls to see whether the
native birds return to their land once their competitors are gone. Small
efforts to remove barred owls in northern California and Canada’s British
Columbia have shown promising results.
Wiens now sees his gun as a research tool. He said
that, by getting involved, humans “may be able to achieve more biodiversity in
the environment, rather than just having barred owls take over and wipe
out all the prey species.”
But not everyone agrees.
Marc Bekoff is a professor of ecology and
biology at the University of Colorado, Boulder. He strongly opposes the
experiment and says humans should find another way to help owls. Bekoff notes
that there is no way to see it as a good thing “if you’re killing one species
to save another.”
Michael Harris directs the wildlife law program for
Friends of Animals, a nonprofit group. He thinks the government should direct
its attention on what humans are doing to the environment and protect habitats
rather than blaming barred owls.
Some Americans see a responsibility to get involved.
They note that humans are to blame for activities like logging, which helped
lead to the drop in spotted owl numbers. But other people just see a losing
situation.
“A decision not to kill the barred owl
is a decision to let the spotted owl go extinct,” said Bob Sallinger. He is
conservation director with the nonprofit Audubon Society in Portland, Oregon.
If reducing the barred owl population improves the
number of spotted owls, the U.S. Fish and Wildlife may consider killing more
barred owls as part of a longer-term effort. Enough success has been noted that
the experiment already has been extended to August of 2021.
I’m Dorothy Gundy. And I’m Bryan Lynn.
Words in
This Article
controversial – adj. relating to or causing
much discussion, disagreement or argument
fascination – n. the act of being very
interested in something or someone
logging – n. to cut down trees in an
area for wood
reverse – v. to move backward;
to make something the opposite of what it was
conservation – n. the protection of animals,
plants and natural resources
wipe
out – v. to kill or destroy someone
or something completely
ecology – n. the field of biology that deals with the
relationship of organisms to one another to their environment
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