| Slaty-backed
Gull, A new Species for Thailand |
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One
of the most rewarding things about ornithology in Thailand is that
it is most certainly not a closed book. It is relatively easy to
find something new when birdwatching in Thailand, be it a previously
unknown site rich in birdlife, a range extension for a particular
species or an interesting migratory date.
However easy
these types of discoveries are, few of us expect to find a new species
for the Thai list even though new birds are added quite regularly.
Still, this is what happened quite recently in a rather convoluted
way. In April Alex
Vargas received a message from Geoff Carey informing him that
he had a photograph incorrectly labeled on his pbase gallery. Instead
of it being a Heuglin's Gull, as he and all the other observers
who saw this bird thought, it was in fact a first winter Slaty-backed
Gull Larus schistisagus with worn plumage. Alex had this
verified by other gull experts and the record has been accepted
as a new species for Thailand. |
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The
above photo was taken at Laem
Pak Bia sandspit on the 4th January 2008 where it was
amongst a group of other gulls including Heuglin's and Pallas's
Gulls. The same bird was photographed by other lucky photographers
who gained a new bird for their Thai lists as a result of
their efforts; this reminds us how valuable making proper
records can be, whether it is by photographic records or
more traditional notes and sketches.
The
range map given for Slaty-backed Gull in Gulls of Europe, Asia and North America (Helm Identification Guides) by Olsen & Larsson (left)
suggests that it may not be that surprising that the species
has found its way to Thailand and indeed Slaty-backed Gull
was a species that some had identified as one to look out
for at gull roosts in Thailand.
It
is also possible that a number of other gull species that
breed and winter in similar areas to Slaty-backed and Heuglin's
Gulls may also be recorded in Thailand in the future by
the vigilant.
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Slaty-backed Gull
(Photo by Peter Ericsson) |

Slaty-backed Gull
(Photo by Johan Svensson) |
Nick
Upton, 9 June 2008. |
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Note
1: Whilst this website does not pretend to be the
official location for announcements such as the above, I
have been waiting (in vain) for the Bird
Conservation Society of Thailand (BCST) to break the
news before placing it here, even though I was notified
as soon as the bird had been tentatively identified. As
it seems that the English version of the BCST's website
is not getting updated I have published the news here considering
that the inclusion of this species on the Thai list does
not seem in doubt.
Note
2: The Gulls of Europe, Asia & North America
by Olsen and Larsson (left) is an excellent publication
that any ornithologist who wants to get to grips with the
many confusing gull species, their moult pattern and other
aspects of their ecology must own. If it had been available
to the observers of this Slaty-backed Gull when in the field
I am sure they would have identified it at the time.
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Related
Pages: Recent Additions to
the Thai Bird Checklist, Laem
Pak Bia/Pak Thale
Tags:
birds,
birding,
thailand,
nature,
gulls, seabirds |
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