NLRG was formed in 1957 to help in the study of birds in the Lancaster and District Birdwatching Society area. There are currently 12 active ringers. Species currently being studied include: Pied Flycatcher, Bearded Tit, Sand Martin, Twite, Goosander, Oystercatcher and Grey Wagtail. Migration has been studied for 28 years at Heysham. We welcome anyone who wants to observe, help or perhaps wish to become a ringer. Photo: A Heysham-ringed Twite on the Mull of Kintyre (thanks to Eddie Maguire)

Friday, 11 May 2012

Sand Martin movements

We received a batch of bird movements today which included 6 birds that were caught in autumn in France on migration. 5 were ringed as juveniles on the river Lune during June and July 2011. The most interesting one is L334113 which was ringed as a breeding bird in July 2010, recaught in June 2011 at Whittington and then caught in Charente-Maritime, France in mid August on migration. I'm getting increasingly interested in how long after fledging the juveniles leave the colony and then how long before they start a southwards migration. From ringed birds we catch it is clear there is a period after fledging but before migrating south juvenile Sand Martins roam, possibly finding somewhere to breed the following year, and then move quite rapidly south. I hope with the 15-20 birds that are caught on their southward migration from the Lune each year we'll soon be able to look into this.

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