Bird-O concludes that the Siberian Thrush experienced reverse migration,
i.e. flying south instead of north to its breeding grounds. While this may
be true, Esperance is a major cargo shipping port of Western Australia.
Therefore, another possible explanation is that the Siberian Thrush started
on its northward journey, encountered inclement weather somewhere in the
coastal waters of South-east or Eastern Asia and, exhausted, sought refuge
on a south-bound ship that finished up at Esperance. If my memory serves me
correctly, it was first reported on Birding-aus that the specimen was found
on a tug at Esperance (happy to be corrected if I'm wrong). To me, that
suggests that the bird was ship-assisted to Australia. If you look at the
shipping list for the Port of Esperance there are quite a few cargo ships
that potentially intersect with the possible migratory path of the Siberian
Thrush.
Stephen Ambrose
Ryde NSW
-----Original Message-----
From:
On Behalf Of Carl Clifford
Sent: Tuesday, 12 July 2011 7:40 PM
To: Simon Mustoe
Cc:
Subject: Photos of Siberian Thrush
Simon,
A rather cracking find, pity it was dead and can't really be added to
the Australian list.. I presume that it has island hopped down the
Sundas and Nusa Tenngara, as the are not renowned for long hop
flights, preferring to refuel every day or so. Pity it had not been
found earlier on its Australian leg but there is a lot of open space
down the WA coast and not many birders looking. Also they are furtive
little devils. It took me 2 hours to finally nail my first one,
despite the fact that it was calling regularly.
Thanks for reporting this discovery.
Cheers,
Carl Clifford
Ps don't suppose anyone could tell which race it was? I presume it was
siberica, as the chances of a davisoni getting here would be an even
more of a wonder.
On 12/07/2011, at 2:56 PM, Simon Mustoe wrote:
http://bird-o.com/2011/07/12/siberian-thrush-first-for-australia/
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