Biologists recently confirmed the presence of a pair of whooping
cranes outside Hayesville, North Carolina, marking the first time the
birds have been documented wintering in Western North Carolina.
Whooping cranes are one of the rarest species in
the world, with a current estimated global population between 525-550
individuals, which is divided into four main groups. All wild whooping
cranes are part of a western population that migrates between Canada
and coastal Texas and now numbers approximately 300. In 1999 state and
federal agencies, non-profits, and private individuals formed the
Whooping Crane Eastern Partnership (WCEP) to restore a migratory flock
to eastern North America. This carefully-managed and heavily-monitored
eastern flock began with a small group of captively-reared birds which
has grown to more than 100 individuals, including the two found in Clay
County. The third and fourth populations are reintroduced populations
of nonmigratory whooping cranes in Florida and Louisiana.
The Western North Carolina sighting of whooping
cranes was reported through the BringBacktheCranes.org website on
December 9, 2011 by Paul Hudson, of Hayesville, N.C. After the initial
report, Jennifer Davis, of the International Crane Foundation, joined
Hudson and confirmed his sighting upon finding the birds foraging in a
soybean field.
“With Jennifer’s great tracking abilities and my
local knowledge, we found the birds again and got to view them from a
safe distance. They lifted their giant wings and displayed while
calling, which echoed across the valley,” said Hudson. “What wonderful
creatures they are, and I got two chances to see them in the wild. How
cool is that?”
Since Hudson’s first sighting, at least two other people have reported the birds.
“We’re pleasantly surprised that we’re beginning
to get a steady stream of reports, since the birds don’t usually pass
through Western North Carolina and we haven’t put out a call for people
to report sightings,” said Billy Brooks, a U.S. Fish & Wildlife
Service biologist who has spent years working with whooping cranes.
“It’s wonderful to see people recognizing that these birds are
something special in their community.”
The cranes are a male/female pair, and biologists
anticipate they’ll mate when they return north in the spring. Like all
members of the eastern population, the birds have identifying leg
bands. The male goes by the number 28-08, meaning he was the 28th chick
hatched to the eastern population in 2008. The female is 5-10, the
fifth chick hatched in 2010.
When young eastern whooping cranes make their
first southward migration, they follow closely related sandhill cranes,
older whooping cranes, or an ultralight aircraft which leads the birds
south from Wisconsin, across Tennessee and Alabama into Florida. After
that first guided migration, the birds are on their own to select a
route and a wintering area. The male of this pair spent last winter at
Hiwassee Wildlife Refuge in southeast Tennessee, along with a handful
of other whooping cranes which winter there with thousands of sandhill
cranes. While Clay County is outside the main migration corridor, it
isn’t far enough to worry biologists.
It remains to be seen whether the pair will make
Western North Carolina their annual wintering ground. Aside from
ecological factors, it may depend, in part, on the behavior of Western
North Carolinians. Brooks advises anyone encountering a whooping crane
in the wild to give them the respect and distance they need. WCEP
recommends not approaching the birds on foot within 600 feet; remaining
in your vehicle; not approaching in a vehicle within 600 feet or, if
on a public road, within 300 feet; remaining concealed and not speaking
loudly enough that the birds can hear you; and not trespassing on
private property in an attempt to view whooping cranes. These birds are
protected by the Migratory Bird Treaty Act and the Endangered Species
Act.
“It’ll be fascinating to see if these birds
remain in Western North Carolina,” said Brooks. “There are a lot of
factors that play into that – not only human disturbance, but also
whether the habitat has what they need to over-winter.”
Whooping cranes were listed as an endangered
species in 1967, the result of hunting and specimen collection, human
disturbance, and loss of habitat. Whooping crane numbers dipped to an
all time low of 16 individuals in 1941. They once occurred from the
Arctic coast to the high plateau of central Mexico, and from Utah east
to New Jersey and Florida. Standing almost 5 feet tall, it’s the
tallest bird in North America. Adult birds are characterized by snowy
white plumage, a crimson crown, long thin black legs, and white wings
tipped with black that measure almost 8 feet in length. The plumage
of juvenile birds is a mixture of cinnamon and white. Deriving their
name from the distinctive whooping call, the call of the whooping crane
can carry for miles.
Recognizing that the few remaining wild birds
had become concentrated in small areas, scientists became concerned
that a single catastrophic event on either the wintering or nesting
grounds could wipe out the population. This led to efforts to establish
additional, separate populations.
The Whooping Crane Recovery Team, a group of
biologists that provide policy and recommendations for the species,
searched for possible locations to establish a second migratory flock.
In 1999, the team recommended that a flock of whooping cranes hatched
in captivity be taught a migration route between central Wisconsin and
the west coast of Florida. The recovery team then sanctioned the
ultralight-led migration techniques of Operation Migration, Inc. as the
main reintroduction method.
In 2001, Operation Migration's pilots first led
captive-reared whooping crane chicks south from Necedah National
Wildlife Refuge in Wisconsin to Chassahowitzka National Wildlife Refuge
in Florida. This effort to guide young cranes to wintering grounds
has become an annual event and is considered key to establishing the
eastern population. To prepare for the journey and release into the
wild, the young cranes are introduced to ultralight aircraft and raised
in isolation from humans. Project biologists and pilots adhere to a
strict no-talking rule, broadcast recorded crane calls, and wear
costumes designed to mask the human form whenever they’re around the
cranes.
In addition to the ultralight-led method,
biologists from the International Crane Foundation rear whooping crane
chicks that are released in the company of older cranes, from whom the
young birds learn the migration route, part of WCEP’s “Direct Autumn
Release” reintroduction method.
Founding members of WCEP include the
International Crane Foundation, Operation Migration, Inc., Wisconsin
Department of Natural Resources, the U.S. Fish & Wildlife Service,
U.S. Geological Survey's Patuxent Wildlife Research Center and National
Wildlife Health Center, the National Fish and Wildlife Foundation, the
Natural Resources Foundation of Wisconsin, and the International
Whooping Crane Recovery Team. Many other flyway states, provinces,
private individuals and conservation groups have joined forces with and
support WCEP by donating resources, funding, and personnel. To report
a crane sighting or learn more about the project, visit the WCEP
website at
http://www.bringbackthecranes.org.