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MIGRATION - 2001
2001 was a very busy year for
our migration tracking. HX returned to Martha's Vineyard from Venezuela in
April, and we tagged four new birds--three on Martha's Vineyard and one in
Charlotte, NC.
Click on the links to find the maps for each bird
listed below, or scroll through them all:
HX -
Spring Migration
HX - Fall Migration
KD - (HX's replacement mate) Pre-migration
wandering
KD - Fall Migration
KB - Felix Neck female KB - Felix Neck female Pre-migration
KB - Fall Migration
KC - Felix Neck male
"Ms. Charlotte" -
Charlotte female
HX
Migration
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HX left his Orinoco Delta home away from
home on 23 March 2001. This was about 8 days after the first birds showed
up on the Vineyard.
Males return a week or so before their mates to reclaim their
territories or, in the case of young birds, to find their first territory.
There's a premium on getting back early--first chance to take over an
abandoned territory, if you're a young bird. HX may have been pretty old
when we tagged him. His nest had been occupied for many years prior to his
getting his transmitter. Maybe this is why he left Venezuela so
late.
The trip home took only 3 weeks--a week less than
the southward migration in the fall of 2000. This is understandable, as
there's no need to get to the wintering grounds in a hurry, but delay in
returning to the breeding grounds may result in the loss of a bird's
territory, as we saw in 2003--Browse on! |
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HX returned to his breeding
area in April, where he attracted a new mate. We trapped and tagged this new
bird, KD, in mid June. As it turned out, the nest had already failed when we
trapped KD. HX was already in Connecticut on the 16th of June when we trapped KD.
Shortly after she was tagged, she began to wander around SE New England, making
two trips back to Martha's Vineyard before heading south on 16 August.
HX Fall Migration
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HX wandered
around Long Island Sound from mid June through September. Once again, he fueled
up for migration on Shelter Island and started his migration on 13 Sept.
This year, as last, he took the shortcut
across a bit of the Atlantic between Bald Head Island, NC, and northern
Florida. From there, he took the usual Osprey "highway to the
tropics" through Cuba and Hispaniola to Venezuela.
He made the trip in only three weeks (a
week faster than last year) and arrived in exactly the same area where he
spent the previous winter (and surely many winters before that). |
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KD - Pre-migration
wandering
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As did her
predecessor, HW, KD left the Island after her nest failed and wandered
around southern New England. She stopped at Lake Assawompsett (the first
two dots on the map NE of the Vineyard), then went down to an area near
Storrs, CT, where she spent most of July. She made one quick trip back to
the Vineyard, returned to CT, and then spent a couple of weeks back on the
Vineyard before starting her migration on 16 August. |
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KD Migration
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KD left the Vineyard in mid August and
made it to the eastern shore of the Chesapeake Bay on 23 August. She then
turned around and backtracked, making it up to the Delaware River between
NJ and PA, where she spent a few days before heading south in
earnest.
She was traveling pretty slowly, arriving in Cuba 18
days later. After another 11 days, she left Hispaniola and then landed on
a boat. We know this because her rate of travel slowed down to a crawl and
we were getting signals from her radio for three days out over deep water.
Ospreys can't rest in the water or stay in the air for three days, so she
must have been perched on a boat.
The signal from her radio returned to Haiti and then
stopped. I suspect that she was shot on the boat and a fisherman took the
radio back home as a souvenir. |
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Felix Neck's KC and KB
We
trapped a new pair of breeding Ospreys in 2001. KC (the male) and KB (the
female) were nesting at the Felix Neck Wildlife Sanctuary. The nest had been
active for more than a dozen years, although the adults rarely successfully
raised young.
KB Pre-migration Wandering
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2001 was no exception to the rule here with another nest
failure. Also true to form, once the nest failed, the female began wandering,
although in this case it would be more accurate to call it commuting. She spent
most of the pre-migration period in NW Connecticut, but returned to the Vineyard
four times before heading south on 11 August. Her "vacation home" was
southwest of Lake Webster, formerly known as Lake Chaugunagungamaug. Just adding the distances traveled
on her "commutes," she logged over 600 miles (1000 km) of frequent flier
miles before beginning what should have been a 3,000 mile trip to South
America. |
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KB Migrates -
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Once
she got going, she took the inland route to Florida and the typical Cuba/Hispaniola
track. While crossing the Caribbean en route to Venezuela, like her neighbor KD,
she landed on a boat
and shortly thereafter we lost her signal. Again we have no idea what happened,
but suspect foul play. Alternatively, she might have landed on the boat
because she was weak and couldn't make it any further. |
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page] KC Fall
Migration
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KC, the Felix Neck male, was the
only bird we've followed so far that stayed close to home before beginning
his migration. 13 September seems like a popular day to begin heading to
South America. KC took the coastal route, passing through Cape May, NJ,
and taking the shortcut across a bit of the Atlantic heading to northern
FL. The rest of his trip was uneventful, and he arrived in the middle of
the Venezuelan llanos (a wet savanna) on 9 October. |
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page] Ms.
Charlotte Fall Migration
In
June we trapped and tagged a female Osprey near her nest on the banks of the
Catawba River about 10 miles north of Charlotte, NC.
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She
stayed close to her nest throughout the breeding season and began her
migration on 13 August. When she got to Cuba, she surprised us by heading
west to the Yucatan Peninsula in Mexico. Hurricane Chantal was barreling
up the Caribbean as she was on Cuba, so at first we thought she might have
been blown off course by the storm, but a more careful look at the timing
of her trip showed that she was already in Mexico when the storm got
there. It's not unlikely, however that on her first migration she met a
storm and was blown west to Mexico. Young birds on their first migration
travel by instinct alone. On subsequent migrations, they will often
retrace the route they took on their first trip south. This would explain
her very unusual route to South America--she was only the second Osprey
tagged in this study that did not go through Cuba.
From there, she
traveled south through the Central American isthmus, crossed two Andean
cordilleiras and made a bee line for the lowlands of western Peru. The
whole trip took a bit more than a month. |
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