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)

Sunday, 11 August 2013

Reed Bed Passerines Have a Good Season

Our ringing visits to Leighton Moss RSPB over the past few days suggest that Reed and Sedge Warblers especially have had a very successful season. The average August  catch of Reed Warblers over the past 16 years has been 366, over the first ten days of this August we have already  caught 232 and mid to late August usually produces the best catches. The breeding population based on the numbers of adults caught (140 against 182 in 2012) appears to be down but productivity has obviously been good. Adults prepare to leave as shown by one caught today weighing 13.8 grams and a fat score of 4. But juvenile weights have yet to show any noticeable increase.

The main Sedge Warbler passage is also in mid to late August. The 16 year average catch is 180. To date we have caught 64.Other warblers also appear to have done well especially Blackcap with 56 caught so far this year compared to just 27 in the whole of 2012.  Our isolated Bearded Tits are our main study. They have also done better this year with 36 juveniles caught compared to only 17 last year. They are now  stating to moult which makes them much more difficult to catch.

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