VIE MIGRATORIE NORD- EUROPEE ( Scandinavia , Mar Baltico e coste , Isole Britanniche )
E’ in corso una interessante discussione sulle Vie Migratorie che interessano le Isole Britanniche ( includendo Scozia,Inghilterra,Irlanda ) accessibile ( copia/incolla)
http://www.trektellen.org/dagrec.asp?telpostland=1&telpost=-1&soort=233&geslacht=&leeftijd=&kleed=&jaar=&mnd=e su
http://www.birdforum.net/showthread.php?t=55105Qui di seguito riporto solo alcuni estratti , ma vorrei sottolineare il primo, riferito al
6 Novembre 2011 per il transito sulla costa Sud-Ovest del Galles ( Cardiff e dintorni ).Viene riportata l’osservazione di due enormi “strisce” migratorie di 10.000 e 9.000 colombacci migranti a Sud , susseguitesi a distanza di 10’ tra le 7,45 e 10,20 del mattino distesi su tutta la linea dell’orizzonte sul mare . ( ndr – ad attraversare la Manica verso la Francia ) .
N.B. : abbiamo voluto verificare da Weather History quale era stata la condizione Barometrica
Riguardante il Nord della Scozia , il Mar Baltico , il Sud della Penisola Scandinava nei DUE giorni PRECEDENTI questo passaggio migratorio di massa : in particolare sul Nord della Scozia , ma anche sulla Penisola Scandinava la Pressione Atmosferica era sbalzata da 985 mB a 1005 -1019-10023 (!!) mB . A conferma che nei territori d’involo di massa lo sbalzo in alto della P.A è uno dei fattori determinanti la decisione d’involo migratorio .
Sunday, 06 November 2011
Peterstone Gout
http://en.wikipedia.org/wiki/Peterstone_GoutMain Sighting: Wood Pigeon
Timed count between 07:45 and 10:20 produced estimated 98,470+ wood pigeon heading west (and about 500 heading NE!). Movement on a broad front spanning from the foot of the coastal hills to about 2km out to sea. At one point the entire southern horizon was covered by a long string and cluster flock of c 10,000 birds only to be followed 10 min later by another of 9,000. Pretty amazing sight.
Molti altri dati interessanti sugli involi di massa si estraggono ( USARE GOOGLE TRADUTTORE) da
http://www.trektellen.org/dagrec.asp?telpostland=1&telpost=-1&soort=233&geslacht=&leeftijd=&kleed=&jaar=&mnd=Country: Netherlands
Species: Woodpigeon - Columba palumbus
Site Number Date
1. De Hamert 233500 20-10-2012
2. De Hamert 163000 02-11-2008
3. De Hamert 154600 19-10-2013
4. Loozerheide (bij Weert) 144235 19-10-2012
5. Loozerheide (bij Weert) 113300 19-10-2013
6. Strabrechtse Heide 105500 02-11-2008
7. De Groote Peel 102595 19-10-2013
8. De Hamert 102100 17-10-2010
9. Aan de Majoor, Koningsbosch 101565 20-10-2007
Ed ecco alcuni ESTRATTI dai Forum
OLANDA
I live in the southeast of the Netherlands, where in autumn easterly winds can bring in 100,000s of migrating Wood Pigeons (last year about 2/3 of the total number of visibly migrating birds!)... This year the numbers were very large, and many flew north/west into the Netherlands looking for fouraging grounds (thus baffling the migration watchers in areas where Wood Pigeons are a less abundant sight). I could imagine *some* Wood Pigeons ending up in Britain last autumn, following the coastline back up north and for that reason being more common in spring (and especially this spring!)
GALLES
Posted 28 September 2013 - 08:36 PM
Hi,I live near to Cardiff and see the migration overhead every year.timing is usually last week of October to first week of November,with 54,000 counted in 2012(local bird forum).usual flocks number from 20 to 1000 with larger flocks so high that they appear as specks(they fly much lower in poor weather,sometimes just overhead)and travel in long strings at first light for only around two and a half hours.they are spread from the coast to approx 4miles inland.did some research and seems they fly from Scandinavia across to and down Britain,crossing over the channel into france and through the Pyrenees were they are hunted as they pass low(footage on you tube).i have asked many local shooters and farmers if they have noticed migration and they are oblivious to it!
I have followed them for last 5years and look forward every year see how patterns change with weather,timing.i don't use this forum much but would be interested to hear if more people have knowledge of why flight stops after few hours and where they feed