Bald Eagles - Symbol of A Nation and A Movement
Though Benjamin Franklin considered a turkey a better icon for our plucky
nation, the bald eagle's regal countenance makes it a compelling symbol for the
United States. This large, white-headed raptor, unique to North America, has
proven itself an inspiring example of the power of environmentalism in the past
forty years. Thanks to a collaborative conservation effort that spanned
multiple states and many environmental disciplines, the bald eagle has come
back from the brink of extinction to fly—and flourish —again.
The
species' delisting from the Endangered Species List in 2007 marked the
completion of a four-decade effort to restore plummeting bald eagle
populations. Down to a mere 417 nesting pairs in the lower 48 states in 1963,
the bald eagle was nearly extinct due to a wide array of environmental factors:
- DDT - Widely used before it was
implicated for the decline of bird populations in Rachel Carson's Silent
Spring and subsequently banned, this agricultural insecticide
caused bird egg shells to thin and break before they hatched, limiting
bald eagles' ability to replenish their numbers.
- Deforestation - The accelerated clearing of virgin,
old-growth and other forests in the first half of the 20th century took
away key habitat for bald eagles. It also didn't help that this continued
into the second half of the 20th century... But at least more
logging regulations are in place now, thanks to concerns raised in the
1970s during the height of the environmental movement.
- Hunting - Not only were bald eagles
killed due to suspicions that they might harm livestock, but also their
prey (including ducks and other waterfowl) was also suffering a population
decline due to over-hunting.
- Water Pollution - Before the passage of the Clean Water Act of 1972, rivers, lakes, streams, you name
it, were severely contaminated due to unchecked dumping of industrial
waste and other pollutants. Given that bald eagles rely largely on water
for their food—fish, waterfowl, frogs, etc.—this also significantly
affected their health.
In
short, a broad array of seemingly unconnected problems was leading to the
demise of the bald eagle. A comprehensive approach had to be implemented, and
fast.
Fortunately,
the newly-formed United States Environmental Protection Agency, Fish and
Wildlife Departments, conservation organizations and state governments banded
together to address all of the problems listed above. Bald eagles benefitted
from the following solutions:
- DDT Banned — At the very end of 1972, over a
decade after the publication of Silent Spring, DDT's use in US agriculture
was banned. (NOTE: it is still used
worldwide against mosquitoes)
- Eagle Killing Prohibited — As per the Endangered Species
Act, it became illegal to hunt and kill the already-scarce bald eagle.
- Water Quality Improved — Thanks to the Clean Water Act
and more targeted regional efforts, water quality in lakes, rivers,
streams, etc. improved dramatically — and so did the health of species
that rely on them.
- Habitat Protection and Restoration — The availability of tall snags
(dead trees) for nesting was guaranteed by habitat restoration projects
and protection of forests. Also, access to key habitat areas was
restricted — human disturbance often
disrupts nesting.
- Captive Breeding — Bald eagles were raised in captivity at zoos and
other sites, and released into the wild. Thanks to the San
Francisco Zoo alone, 100 eagles were released in 16 years.
It
all boiled down to basic arithmetic and basic cooperation. The arithmetic that
if you add more eagles to the ecosystem than what you remove, their populations
will grow. And if you provide more habitat and food than you take away, they
will have enough.
Cooperation
was also a key component of this effort, and what makes it such an inspiring
story. The broadly recognized need for eagle conservation, and for
environmental protection in general, sparked a national effort spanning
disciplines from agriculture to federal policymaking, conservation to
restoration.
And let's not forget the freedom of speech and of
the press that started it all—manifested in the strong case for ecologically
sound practices brought forth by a well-educated and outspoken woman, Rachel
Carson.
Big takeaway? Our much-vaunted freedoms can be
used for the good of the environment, as well as our own benefit. And
thanks to this idea, the bald eagle is thriving again.
Want
to help support bald eagle conservation? Donate
to the Audubon Society and learn more about what they do for bald eagles.
Check
out bald eagles in the wild on the following SEEtheWILD
trips: Alaska By
Sail, Gulf Islands,
British Columbia, and Queen
Charlotte Islands, British Columbia.
Want
to hear more? Check out some inspiring wildlife stories in Wild Hope
eMagazine.
Eagle photos: Kevin J. Smith/Maple Leaf Adventures
Eagle photos: Kevin J. Smith/Maple Leaf Adventures