I have posted this to the group because some may find it interesting. Basically its saying that there was a lot of flocks of birds moving across the UK heading East at the early part of the week. Its conclusions are leaning towards the possibilities of  - SWIFT.  PLEASE READ THE MAILS BACKWORDS STARTING FROM THE BOTTOM OF THIS PAGE......
Cheers,
Bryan.

Hi Clive / Hans
Suggest the deep (for the time of year) double centred low 993 / 994
off the western coast off Ireland moving slowly NE and with
influence extending to NE England might have played a part in the in
the big spurn Swift movement during the day of the 25th. Were the
birds going south?..... If so classic skirting conditions according
to Lack.

Dave

--- In vismig@yahoogroups.com, "Clive McKay" <clive.mckay@...> wrote:
>
> Hi Hans, Dave et al
>
>
>
> Have just noticed that Spurn had its largest Swift movement of the
year
> during the day on Wednesday 25 June - 11,000 birds. Could these
have been
> birds displaced from the continent heading back that way overnight
on the
> radar?
>
>
>
> (see Trektellen http://www.trektellen.nl/trektelling.asp?taal=2
> <http://www.trektellen.nl/trektelling.asp?
taal=2&telpost=285&datum=20080625>
> &telpost=285&datum=20080625)
>
>
>
> Talking of Swifts, Gerard has just added Pacific Swift to the
Trektellen
> species list so that the one >S at Spurn on Sunday 21st could be
added!
>
>
>
> Cheers
>
>
>
> Clive
>
>
>
> Knowehead Cottage
>
> Kilry
>
> by Alyth
>
> PH11 8JA
>
>
>
> Tel: 01575 560 776
>
> Mob: 07884 340 640
>
>
>
>
>
>
>
> _____
>
> From: vismig@yahoogroups.com [mailto:vismig@yahoogroups.com] On
Behalf Of
> David Barker
> Sent: 26 June 2008 22:04
> To: vismig@yahoogroups.com
> Subject: Re: [vismig] high altitude bird migration on the radar
screen
> between UK and Holland
>
>
>
> Hi Hans / Clive etal
> Have just seen you mails and very good to have this kind of info!
Agree that
> Lapwings and Curlew should be moving west (opposite direction at
this time
> of year) into the prevailing wind.... have they got mixed up?
Conceivable
> that on Monday / midnight /Tuesday Swifts could have been going
east but
> that on Wednesday / midnight / Thursday they too should also have
been going
> west. Suggest some sort of avoidance tactic is taking place to
move out of
> the way of the nasty LOW which has moved NE up the Atlantic UK
coast and
> brought heavy rain to us today?? Also Sundays deep and very windy
LOW could
> have played a part with the move earlier in the week? The jet
stream looks
> to be quite active west from the UK into the Netherlands and into
Germany,
> would 3km altitude be under the influence of the stream or would
it not be
> high enough?
>
> For those that dont know where to find the archive pressure charts
they are
> here:
>
> http://www.wetterze
<http://www.wetterzentrale.de/topkarten/tkfaxbraar.htm>
> ntrale.de/topkarten/tkfaxbraar.htm
>
> there is a latest 0600 2008-06-26 Jet stream chart here:
>
> http://www.wundergr
> <http://www.wunderground.com/global/Region/EU/2xJetStream.html>
> ound.com/global/Region/EU/2xJetStream.html
>
> Will have a think about other species groups but none immediately
come to
> mind.
> Dave
>
> ----- Original Message -----
> From: Clive McKay
> To: vismig@yahoogroups. <mailto:vismig%40yahoogroups.com> com
> Sent: Thursday, June 26, 2008 7:36 PM
> Subject: RE: [vismig] high altitude bird migration on the radar
screen
> between UK and Holland
>
> Hi Hans
>
> It's hard to imagine what species could be involved other than
Swifts at
> this time of year. The only waders coming from Britain that might
be on the
> move are Lapwings and Curlews - but as you say, these should
really be
> moving in the opposite direction.
>
> Cheers
>
> Clive
>
> Knowehead Cottage
>
> Kilry
>
> by Alyth
>
> PH11 8JA
>
> Tel: 01575 560 776
>
> Mob: 07884 340 640
>
> _____
>
> From: vismig@yahoogroups. <mailto:vismig%40yahoogroups.com> com
> [mailto:vismig@yahoogroups. <mailto:vismig%40yahoogroups.com> com]
On Behalf
> Of
> Hans van Gasteren
> Sent: 26 June 2008 17:58
> To: 'Clive McKay'; vismig@yahoogroups. <mailto:vismig%
40yahoogroups.com> com
> Subject: [vismig] high altitude bird migration on the radar screen
between
> UK and Holland
>
> Hi all,
>
> I posted a message in the Dutch vismig group. But since it concerns
> migration from the UK towards Holland and beyond, here the English
version.
>
> During two occasions this week (Monday/Tuesday and
Wednesday/Thursday) we
> noticed extremely high altitude (>3km) bird migration in The
Netherlands. On
> the radar screen (300km diameter) bird echoes were coming from the
UK and
> flew in easterly directions using the W/WSW winds at this altitude
to
> increase their own airspeed (14 m/s) to ca 26 m/s on the first
> evening/night. Bird echoes were certainly flocks. The number of
echoes on
> the radar screen was not high, continuously 20/30 echoes, during
the period
> of 17.00 - next sunrise at about 4.00 hours. All echoes continued
their
> easterly direction far into Germany! So we could follow them on
radar for at
> least 300km!
>
> Question is, what kind of species are involved? Although high
numbers of
> swift were seen both in the UK as in Holland, I doubt these flock
sized
> echoes are from Swifts. The own airspeed of 14 m/s on at least the
first
> night, indicates waders. First reactions here in Holland refer to
Lapwings
> (but these should go the other way around from Holland towards the
UK), but
> also Common Ringed Plovers. Are these high arctic birds still in
NW-Europe?
> Any ideas, also from other species groups?
>
> Regards,
>
> Hans
>
> Van: Clive McKay [mailto:clive.mckay@ <mailto:clive.mckay%
40btinternet.com>
> btinternet.com]
> Verzonden: Thursday, 26 June, 2008 6:08 PM
> Aan: 'Hans van Gasteren'
> Onderwerp: RE: [trektellers] hoge vogeltrek op radarscherm
>
> Hi Hans
>
> Since your e-mail to Trektellers mentions England I wonder if you
could send
> a one-line summary to the vismig yahoo group??!!!
>
> Cheers
>
> Clive
>
> Knowehead Cottage
>
> Kilry
>
> by Alyth
>
> PH11 8JA
>
> Tel: 01575 560 776
>
> Mob: 07884 340 640