As hurricane
season gets under way and Tropical Storm Isaac bears down on the Caribbean, biologists are paying particular attention to
this fall’s shorebird migration.
Researchers at
the Center for Conservation Biology (CCB) in Williamsburg, Virginia have
documented incredible feats of endurance by migrating Whimbrels (large
shorebirds with long, down-curved bills) flying through storms, only to fall
foul to the guns of unregulated hunting on islands such as Guadeloupe and
Martinique as well as Barbados, French Guiana, Suriname and Guyana.
Using satellite
transmitters attached to the birds, researchers tracked one Whimbrel – named
Hope – through a large tropical storm in 2011. She took 27 hours averaging just
9 mph to fly non-stop through the storm to get to the center; then she flew at
an average of almost 100 mph for 1.5 hours out the back end, using the power of
the storm to “slingshot” her towards land.
“Our research is
documenting some of the truly amazing dynamics of bird migrations. In
addition to the simply staggering distances these birds travel – often
thousands of miles at a time, nonstop – we are also observing what could be
described as jaw dropping physical feats involving storms,” said Fletcher
Smith, lead biologist on the tracking project. “These herculean efforts leave
the birds exhausted and in need of a safe haven to rest and refuel.
Unfortunately there are few of these locations in the Lesser
Antilles.”
Some locals
gather at recreational shooting swamps in the Caribbean
to slaughter with impunity everything that flies by. They claimed perhaps their
most notable bird victims last year: two Whimbrels named Machi and Goshen that were being
tracked by Smith’s team. Over a lifetime Machi is estimated to have flown
27,000 migration miles and made it through Tropical Storm Maria; Goshen had flown 14,000
miles including several hours battling Hurricane Irene. Forced to land in
Guadalupe, an area they had avoided in previous recorded migrations, they were
then killed by the unregulated hunters.
American Bird
Conservancy (ABC) and other bird conservation groups expressed outraged at the
continued tolerance of the shooting ranges, especially in Guadeloupe.
“This mass
slaughter of birds has to stop,” said Dr. George Fenwick, President of American
Bird Conservancy. “These shooting parties are the antithesis of everything the
hunting community stands for here in the U.S. They don’t care about the
impact they have on the environment, give nothing back in the way of permit
fees to promote conservation efforts, and sometimes don’t even bother to
collect the birds they shoot.”
In a letter to
the French Ministry of Ecology – which has an oversight role on the island –
ABC requested that it “…. take immediate measures to stop unregulated and unmonitored
shooting on the island
of Guadeloupe.” The
letter also referenced “…the pressure that unregulated hunting has on
shorebirds in this French department,” and demanded that “…the Ministry of
Ecology put a stop to this barbaric practice in all French departments of
(Latin) America and adopt practices that protect avian wildlife in this
hemisphere.”
“Sometimes
something good can come out of something bad and in this case, I believe the
good that may emerge is that island conservation groups and regulators will
begin to take a more critical view of how to more effectively manage hunting
practices in their communities,” Dr. Fenwick said.
The shorebird
tracking project is a collaborative effort between the Center for Conservation
Biology, the Canadian Wildlife Service, The Nature Conservancy, the U.S. Fish
and Wildlife Service, Georgia Department of Natural Resources, Virginia Coastal
Zone Management Program, and Manomet
Center for Conservation
Sciences. The project will ultimately track 20 migrating Whimbrels to better
understand migratory pathways and locations that are critical for this
declining species. The study has tracked Whimbrels for more than 185,000 miles
(300,000 kilometers) since 2008.
According to ABC,
shooting swamps are one of several threats birds face in the Caribbean.
In addition, wetlands throughout the islands are vanishing due to increasing
tourism development, agriculture and urban expansion. More than half of the
wetlands that remain are seriously degraded by the cutting of mangroves and
coastal forest, pollution, water mismanagement, and natural catastrophes such
as droughts and hurricanes. As a result, many threatened birds that rely on
these Caribbean wetlands are now declining.
Whimbrel
The Whimbrel - Numenius
phaeopus - is one of the most widespread of the worlds curlews. It is a
migratory species wintering on coasts in Africa, South America, South Asia and Australasia. Some migrating Whimbrels make a nonstop
flight of 4,000 km (2,500 miles) from southern Canada
or New England to South America. Four distinct
subspecies of Whimbrel are recognized. One breeds in North America, one from Iceland to northwest Siberia, one in southern Russia, and one in eastern Siberia.
Most southern African birds probably originate from eastern Russia and Siberia,
arriving in the region from August-October and staying until about late March
and April.
Description
A large shorebird
and its plumage is plain mottled-brown overall. A long down-curved bill, longer in the female,
long neck and legs. The crown is dark with a distinct light stripe in the
middle. Juveniles are similar to adults, but the crown stripe less distinct,
breast more buff, and with finer streaking on neck and chest.
Call
The call is a
rippling whistle, prolonged into a trill for the song. Its alarm call is a
harsh squawk.
Food
This species
feeds by probing soft mud for small invertebrates and by picking small crabs
and similar prey off the surface. The primary winter food of crab and the curve
of the bill nicely matches the shape of fiddler crab burrows. Most of its
foraging is done at night, probing and pecking in search of prey.
Breeding
A shallow bowl on
the ground, usually lined with leaves, usually concealed in low grass or
heather. Three to five blue-green to brownish or buff eggs are laid. Both
parents incubate the eggs for between 22 to 28 days. The chicks leave the nest
soon after hatching and stay hidden among the surrounding vegetation. Both
parents care for the chicks until they fledge in 35 to 40 days.
Conservation Status – Least Concern
Whimbrels are
among the most abundant Curlews because of their extensive breeding range. Human
impact is the biggest threat. Whimbrels are affected by habitat loss of nesting
sites and refuelling staging posts along the migration route, and pollution of
shorelines. In the early 1900s, they were hunted in the US as they
migrated south. The slaughter had reduced populations there from thousands to a
few hundred. Despite the fact that the population trend appears to be
decreasing, the decline is not believed to be sufficiently rapid to approach
the thresholds for Vulnerable.
Birdwatching
Ask Aves Birding Tours/Safaris/Adventures
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Aves Eastern Cape Birding
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Aves KZN Birding
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Aves Western Cape Birding
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Aves West Coast
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