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15 Sep-14 Oct 2012.
Thatch finally started migrating, leaving
Cape May at about 9:30AM on the 15th--teenagers
never get started early!
As of the 1st of October he was on the northern coast
of Cuba in a spot that looks like Osprey heaven.
He moved on through Cuba and Hispaniola and then
crossed the Caribbean in style and without
incident.
Sadly, he stopped on Curacao for a couple of weeks and either
dropped his transmitter (unlikely) or
died--perhaps the victim of a shooting.
Scroll down for all of Thatch's maps for 2012,
or...
Skip to the start of fall migration. |
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3 Sept 2012.
For most of August, Thatch has been hanging
out at Cape May, NJ. Knowing how many birders
there are over there, I put out a "hit" on
Thatch through the Delaware Valley
Ornithological Club, asking for someone to shoot
Thatch--with a camera, of course!
It didn't take long. Georgia and Barrie Ashby took this
shot at 9:23AM on Sept. 3rd as Thatch flew over
one of the ponds around the lighthouse.
I wonder how many times Thatch will get counted by the
hawk migration watchers before he heads south.
;-)
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Spring Migration overview: 4 June 2012.
Home at last! Thatch
must have finally caught the last fish in the
Turtle River and decided it was time to get to
his high school reunion after all. He spent a
little over a month fishing just west of
Brunswick, GA, and then all of a sudden took off
and was home 6 days later!
You know the drill--scroll down for the rest of
the story.
Start of spring
migration
Florida and points
north
Summer movement
Fall migration |
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1-31 Jan 2012.
Thatch's New Years' resolution: I think I
should explore more and not be satisfied with
just the same old same old....
So it's back upriver for our intrepid teenager. |
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1-29 Feb 2012.
Thatch is exploring new territory here.
He's never been this far west.
It's very unusual for a bird that's been down on the
wintering grounds to explore new countryside
more than a year after arriving. |
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Mid February 2012.
I just love looking at the intricate and
almost abstract patterns that the big rivers
etch through the landscape of Amazonia. The lake
where Thatch spent a few days in February was
once, thousands of years ago, a loop of the
Amazon, which is now 15 miles southwest of this
lake. |
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1 Jan - 29 Feb 2012.
Here's his track for January and February. |
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Nov 2010 - Feb 2012.
This map shows all of Thatch's travels for
the 15 months he has spent along the Amazon
River.
He should be heading north in April or May. |
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1 Mar - 23 Apr 2012.
This map shows the small cluster of
locations in the far west of his 15-month range
(shown in the previous map). He spent his last
two pre-migration months fueling up in this
small area before taking off for "points north"
(an old friend of mine used to think that was a
town somewhere north of Boston) around 10:00AM
on the 23rd. |
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22-23 Apr 2012.
Thatch is heading home! |
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23-26 Apr 2012.
Thatch is following a course pretty much
parallel to the route he took coming south back
in the fall of 2010 (in orange). |
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27-29 Apr 2012.
As he climbed over the Cordilleira de
Merida and headed down into the Lake
Maracaibo Basin, he was covering some familiar
ground--his route south back in 2010.
On the 28th he roosted in Venezuela, close to the
Colombian border, just south of the Guajira
Peninsula. |
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29 Apr 2012.
Thatch took off shortly after 7AM on the
29th, heading northwest. When he got close to
the coast he realized he could stay over land
(one of the prime directives in Osprey
migration) and still make progress north (I'm
not implying this was a conscious decision, but
rather an instinctual one) if he headed
northeast. So he did.
At about 4:30PM he was at the coast just west of Bahia
Hondita, where our first juvenile (Jaws) to make
it to South America spent his 18 months "down
south." Normally, I'd expect a bird to stop at
the coast this late in the day. But our boy was
on a roll and pushed out over the Caribbean.... |
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29 Apr - 1 May 2012.
The last GPS fix for the day was at 6PM. He
flew through the night, maintaining a very tight
compass heading until he reached Jamaica around
11AM, 28 hours after he started this leg of his
journey. It doesn't look like he stopped to rest
until he had flown another hour. During that
period he flew 630 miles (1,010 km) at an
average pace of 22 mph (35 kph).
(He had a pretty rough crossing on the way south!) |
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This map and the
next show us how migratory routes are shaped by
geography. While less averse to migrate over
large expanses of open water than those raptors
that really depend on thermals, Ospreys stay
over land as long as possible, as long as they
are heading in the appropriate general direction
(north in spring, south in fall). This is true
of most birds, and it's why south-pointing
peninsulae (is that just too tacky?) like Cape
May are such great spots to watch migration in
the fall. Similarly, the Guajira Peninsula in
Colombia would be a phenomenal place to watch
Ospreys (and who knows what else) migrate north
in the spring. |
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Here's a closer look at
how Belle (blue track, orange balloons) and
Thatch (red and red) were funneled to this
northernmost spit of South America.
We cam only speculate about why they split tacks at
some point southeast of Jamaica, but it probably
is related to wind direction.
We can infer from all the Ospreys we've followed that
they really don't care about details in the
middle of their migration--they "go with the
flow" and let the wind push them a bit east or
west--as long as they're staying over land and
heading in the right general direction. When
they get close to their destination, then true
navigation kicks in and they head for their nest
or wintering area, whichever way the winds are
blowing. |
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30 Apr 2012.
When Thatch finally stopped for a breather
near Jamaica's north shore, after 29 hours on
the wing, it was only for an hour before kicking
off and continuing his migration. This is a bird
on a mission! And it certainly tells me that the
transmitters are not a burden. |
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30 Apr - 1 May 2012.
After his one-hour pit stop, he flew
another 6 hours, crossing 113 miles (182 km) of
open water between Jamaica and Cuba.
When he settled down for the night on 1 May, his
roost-to-roost distance traveled was 1,800 miles
(2,920 km) in just 9 days. |
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1-4 May 2012.
This is how we like to see out birds
move through Cuba--quickly! We don't want them
stopping to spend any time at fish farms.
The orange track is his route south back in the fall of
2010. He crossed that path twice in his travels
through Cuba. Apparently, he didn't remember to
turn north when he was just south of Florida, so
he made an easy trip a bit longer than it had to
be.
He left Cuba around 11 AM on May 4th. At 7 PM we
got his last GPS fix. He kept on flying and hit
the Florida coast 120 miles later, probably
around midnight, just west of Tampa.
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5-6 May 2012.
Thatch worked his way across Florida on the
6th. For some reason, when he got to the east
coast he turned south. He spent the night down
by Cape Canaveral, which proved to be a popular
spot this spring. Thatch's cohort-mate Belle
flew through Cape Canaveral on her way north
about a week after Thatch was there. |
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6-15 May 2012.
After a night at Cape Canaveral, Thatch
headed north--maybe he spent some time at the
space center getting his internal compass
realigned.
On the 15th he made it to the coastal marshes just west
of Brunswick, GA. |
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15 May - 3 June 2012.
This looks like Osprey Heaven. He's
spent two weeks here, so far.
Every young that we watch come home for the first time
provides fascinating insights into the process
of a bird getting established in the breeding
population. Will he stop here? Almost all males
nest very close to their nest (within 10-20
miles), so we expect Thatch will continue north
at some point, and he may not even make it all
the way home. One young tagged in Minnesota
never did get all the way home. It spent the
summer in Louisiana and returned south in the
fall without getting close to his home turf. |
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15 May - 19 June 2012.
Thatch is
finally on the move. I was wondering if he was
going to spend the whole summer in Georgia. This
would not be unprecedented. A young tagged by my
colleague Mark Martell in Minnesota got to
Louisiana on his first trip north and spent the
whole summer there.
Thatch started the last leg of his migration
around noon on the 19th. About 6 hours later he
settled down to roost for the night just west of
the Broad River. |
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19-20 June 2012.
Thatch got
started sometime after 7 AM and moseyed along,
probably doing some hunting until 10 AM. In
those 2-3 hours he moved only 13 miles (21 km).
That's much too slow for a bird actually in full
migration mode, so I suspect he was hunting. But
the interesting thing is that he was heading in
the right direction as he wandered around the
area--clearly multi-tasking!
Around 10, he got going. About 7 hours later he
settled down for the night.
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20-21 June 2012.
Thatch is in
full migration mode, moving up the coast. He
crossed the VA state line around 2:30 PM and
settled down west of Norfolk for the night
sometime before 4 PM. |
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23-24 June 2012.
Thatch crossed
the mouth of Chesapeake Bay between 8 and 9 AM
on the 23rd and then moved 89 mi. (143 km) north
through the DelMarVa (Delaware, Maryland, and
Virginia all claim part of this bit of land)
peninsula in about 5.5 hours.
He started the last leg of his trip sometime before 8
AM on the 24th, but was only drifting in the
general direction of home, a mere 56 linear
miles (90 km) from his evening roost. He did
some serious dilly-dallying along the way, given
that it took him over 5 hours to move about 60
miles.
By 1 PM he was back in his old back yard, 660 days
after he first left home back on the 4th of
September 2010! What a guy. |
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18-24 June 2012.
Thatch covered
fairly familiar ground on his trip north, never
far from the track he laid down back in the fall
of 2010. |
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24 Sept 2010 - 24 June 2012.
The whole round
trip--660 days from the start of his fall
migration to his return home in 2012. |
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24 June - 4 July 2012.
Thatch is back in his
'hood! He spent 11 days around his natal
territory before heading out across the mouth of
the Delaware Bay on July 4th. |
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4-24 July 2012.
Thatch is exploring
Cape May, NJ. |
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18-24 July 2012.
Thatch has found some
good fishing in the shallow waters of Delaware
Bay near Del Haven, NJ, and (just to confuse us)
Miami Beach. (Seriously?) |
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24 July-4 Aug 2012.
Thatch made a 3-day trip back to his
home turf in Delaware, but decided he likes Cape
May better. For the moment. |
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5-30 Aug 2012.
Thatch left Cape May on
Aug 12th and spent 2 weeks flying around his
natal home range in Cape Henlopen, DE. On the
24th he flew back to Cape May, where he's been
since.
He should be heading south soon. |
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24-30 Aug 2012.
Thatch is over on Cape
May teasing the hawk watchers. |
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3 Sep 2012.
Sam Galick was birding on Cape May when he
took this picture of Thatch about to catch some
fuel for the trip south. Sam reports that Thatch
has been spotted several times by the migration
counters at the Cape May Hawk Watch platform.
Thatch took off for points south 12 days later, on the
15th. |
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15-22 Sep 2012.
Thatch started his migration, leaving Cape
May at about 9:30 AM on the 15th--teenagers
never get started early!
By 2 PM he was in his 4th state for the day and between
4 and 5 PM he was flying across the mouth of
Chesapeake Bay, right over the Bridge-tunnel. He
settled down for four days between Norfolk and
Virginia Beach. |
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15-19 Sep 2012.
Thatch spent 4 days here on the southern
edge of Chesapeake Bay. A nasty storm was moving
up the coast during these days, so that explains
the hiatus in his migration. |
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19-22 Sep 2012.
Thatch left the Virginia Beach area
sometime before 9 AM and settled down for the
night of the 20th near Jacksonville, NC, about 9
hours later. He covered 222 miles (357 km)
during the day, averaging probably about 22
MPH--a bit on the low side of normal cruising
speed for a migrating Osprey, but only by a
little. |
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21-27 Sep 2012.
Thatch is really hugging the coast as he
heads south. He's making great time.
The blue track is his route south on his first trip
south back in 2010. |
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25 Sep-1 Oct 2012.
Thatch slowed down a bit in Cuba. His moves
on the 27th and 29th were short ones. So was the
move on the 1st. |
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1 Oct 2012.
Thatch is in a good place. Looks like a big
shallow bay and no tempting fish farms nearby! |
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1-9 Oct 2012.
Thatch got to the eastern tip of
Cuba around 3 PM on the 3rd and decided not to
make the jump over to Hispaniola. He backtracked
along the north shore and settled down for three
days. He then took off on the 9th shortly after
8 AM. About 4 hours later he left Cuba behind. |
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9-11 Oct 2012.
Thatch crossed the open water between Cuba
and Hispaniola in just over 2 hours and settled
down for the night a couple of hours later. On
the 10th he moved into the D.R. and,
overshooting the normal route to South America
via Cabo Beata, he pushed on to the east. |
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9-11 Oct 2012.
Thatch ran out of land and headed southeast
just south of Punta Cana just after 2 PM. |
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12-13 Oct 2012.
Thatch had a much easier crossing in 2012
than he did in 2010. That year, he was blown
every which way by a series of storms and rather
miraculously survived an 1,100 mile journey that
lasted about 57 hours. This year was a cake walk
by comparison. His crossing to Bonaire was only
430 miles (695 km) and took a mere 17 hours. He
is now 1,130 miles (1,820 km) from his wintering
area on the Amazon River. |
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13-29 Oct 2012.
Thatch put his migration on hold while
he tried to catch all the fish in this small bay
in western Curacao. Sadly, this was the last
stop for Thatch. If pressed, I'd have to guess
he was shot. He was migrating in good form and
seemingly had no trouble crossing the Caribbean.
This is not the first bird we've lost under suspicious
circumstances on Curacao. Back in the fall of
2010, "Mr. Hannah," and adult male from
Nantucket, spent some time in this very lagoon
and then moved back down the island to a more
populated area where his signals ended.
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