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)

Saturday, 10 July 2010

Sand Martin success

This year has been a record breaker for Sand Martins and the season is far from over. So far a total of 1798 captures have been made at 2 large colonies on the Lune and a small colony on the Hindburn.

The totals so far are:
New adults 660
New Juvenile 794
Controls: 5
1 from Spain in 2008 (Caught in 2009 on the hindburn)
2 carrying French rings
1 from Sussex
1 unknown

This compares to a total from 2009 of 166 Juveniles and 205 adults.
While a direct comparison in totals is not valid as the weather this year has allowed visits at times when most juveniles are about there is clearly a huge increase in Sand Martin population in the Lune valley this year.

46 birds ringed in 2009 have been recaught this year. This is broken down as follows: 9% of juveniles ringed last year in the Lune valley have been retrapped this year and 15% of adults. On the face of it this is a low survival rate of adults however as the colonies have grown we are not managing to cover 100% of the holes. An additional complication is a new colony has appeared with about 400 holes between the two main colonies on the Lune. A visit is planned to see how many of 2009 ringed birds are breeding there.

A much fully report will appear here at the end of the season.

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